OB Convict Cichlid - UK

The OB Convict Cichlid, also known as the Orange Blotch Convict, is one of the most eye-catching and rewarding cichlids you can keep in a home aquarium. Listed here for aquarists searching for tropical fish for sale UK, this striking colour form of Amatitlania nigrofasciata combines the toughness of the classic zebra convict with bold marbled orange, cream, black, and smoky patterning. If you want a hardy Central American cichlid UK hobbyists can keep with confidence, this fish stands out for personality, breeding behaviour, and adaptability. Adults usually reach a practical convict cichlid size of around 10-15 cm, with a potential convict cichlid lifespan of up to 10 years when kept in stable conditions. It is often recommended as a beginner cichlid UK keepers can learn from, but it is not a soft community species; understanding OB convict care, convict cichlid aggression, and correct convict cichlid tank size is essential. See our detailed photos showing the marbled body pattern, deeper orange flank colour, and the differences between juvenile and adult fish. For aquarists who want to buy fish online and enjoy a bold, interactive species with real character, the OB Convict Cichlid offers a brilliant mix of colour, intelligence, and classic cichlid behaviour.

Where Do OB Convict Cichlids Come From? Natural Habitat Explained

The standard convict cichlid, Amatitlania nigrofasciata, is native to Central America rather than South America, despite how it is sometimes labelled in the trade. In the wild, this species occurs in rivers, streams, and rocky margins across parts of Honduras, Guatemala, Costa Rica, Panama, and Nicaragua. That natural background matters because it explains the fish's toughness, territorial nature, and preference for caves, broken sight lines, and mineral-rich water.

Wild convicts live in freshwater habitats with stones, roots, submerged branches, and crevices that provide spawning sites. Water flow can vary from gentle to moderate, but oxygen levels are usually decent and the fish are used to stable, clean conditions. Typical convict cichlid water conditions in aquaria should therefore aim for good filtration, regular water changes, and a pH that is neutral to slightly alkaline. The ideal convict cichlid pH level is generally 7.0-8.0, with moderate to hard water matching natural convict cichlid water hardness.

The Marble Convict Cichlid and other OB forms do not occur naturally in the same way as the wild barred fish. Instead, they are line-bred in captivity for blotched or marbled colour. That makes the OB Convict Cichlid especially attractive for hobbyists looking for unusual tropical fish for sale uk or rare tropical fish for sale uk that still have dependable hardiness. If you are researching OB convict vs regular convict, the care is broadly similar, but the OB fish offers a more variable pattern and often stronger orange tones.

Because this is a robust aquarium strain, it has become popular with people searching tropical fish for sale online, live tropical fish for sale uk, and best place to buy tropical fish online uk. It is also a sensible choice for aquarists who want to buy tropical fish UK wide without jumping straight into delicate species such as tropical discus fish for sale uk or tropical puffer fish for sale uk. In short, this fish brings the behaviour of a classic convict cichlid UK favourite into a more decorative colour form.

How to Set Up the Perfect Tank for OB Convict Cichlids

One of the most common questions aquarists ask is about convict cichlid minimum tank size. For a single fish or a carefully planned pair, 150 litres is the practical minimum, but bigger is always better. If you are planning a pair, breeding project, or mixed cichlid setup, 180-240 litres gives much better control over territory. The right convict cichlid tank size is not just about swimming room; it is about reducing conflict, creating cave zones, and giving subdominant fish space to retreat.

Tank Size Requirements

For a single specimen, a 150-litre aquarium can work if it is well scaped. For a pair, especially if you expect convict cichlid breeding, 180 litres or more is strongly recommended. If you are researching convict cichlid tank mates 55 gallon, that size can work for a pair with selected robust companions, but stocking must be conservative. During spawning, even large tanks can feel small if there are not enough visual barriers.

Water Parameters

The best convict cichlid water parameters are straightforward: keep temperature between 20-28°C, pH 7.0-8.0, and hardness around 10-25 dGH. The most reliable convict cichlid ideal temperature for day-to-day care is 24-26°C. That range supports appetite, colour, and activity without pushing metabolism too hard. If you are checking convict cichlid temperature for breeding, slightly warmer water around 26-27°C can help encourage spawning when combined with extra conditioning foods and clean water changes.

Filtration

Good filtration is essential because cichlids are messy eaters and often dig. Use a filter rated above the aquarium volume, aiming for steady turnover and strong biological capacity. External canisters are ideal for larger cichlid tanks because they handle solid waste well and keep maintenance simple. Convicts do not need river-level current, but they do benefit from well-oxygenated water and stable biological filtration.

Substrate

Sand or smooth fine gravel works best. These fish dig, rearrange decor, and excavate around caves when preparing to spawn. A natural sand bed lets them display normal behaviour without damaging their mouths. Darker substrates often make the orange and black marbling of the Zebra Cichlid OB stand out better.

Plants & Decor

Many keepers ask whether planted tanks work. The answer is yes, but choose tough species and secure them well. Hardy attached plants are better than delicate stems. If you are browsing tropical fish tank plants for sale uk, tropical fish plants for sale uk, or even searching for tropco plants, look for Anubias, Java fern, and robust Vallisneria. Use rocks, ceramic caves, coconut shelters, and driftwood to break lines of sight. If you like alternative convict varieties, compare this fish with the Amatitlania Nigrofasciata «Marble» - Marble Convict, which can be kept in a similar hardscape-focused setup.

Lighting Requirements

Moderate lighting is enough. Strong light is not necessary unless you are growing demanding plants. A 7-9 hour photoperiod suits most aquariums and helps fish feel secure if combined with shaded areas. Floating cover or wood shadows can reduce stress in more dominant individuals.

What Do OB Convict Cichlids Eat? Complete Feeding Guide

Convict cichlid diet is one reason this species is so popular. They are omnivores and accept a wide range of foods, making convict cichlid feeding simple for most keepers. In the wild they graze on insect larvae, small crustaceans, plant matter, algae, and organic debris. In captivity, the goal is not just to fill them up but to provide variety that supports colour, growth, breeding, and long-term health.

Staple Foods

A quality cichlid pellet should form the base diet. Choose a medium pellet suited to the fish's mouth size and feed once or twice daily. This is one reason the species is often listed among tropical fish for beginners; they are not fussy, and they quickly learn feeding routines.

Supplemental Foods

Supplement the staple with frozen foods such as bloodworm, brine shrimp, mysis, and daphnia. Blanched spinach, shelled peas, or spirulina-based foods can add useful plant matter. This mixed feeding approach is especially useful when conditioning an OB convict cichlid breeding pair or growing juveniles.

Treats & Special Foods

Treat foods should be used sparingly. High-protein foods are useful before spawning, but too much rich food can encourage obesity and digestive problems. If you are used to softer community species or browsing tetras for sale uk, tetra fish for sale uk, or community tropical fish uk, remember that convicts are more robust feeders and can outcompete timid fish very quickly.

Feeding Frequency & Portion Control

Feed adults 1-2 times per day, giving only what they finish in around 30-60 seconds. Juveniles can be fed smaller meals 2-3 times daily. During active convict cichlid breeding, parents often eat less while guarding eggs or fry, so do not panic if appetite dips temporarily.

Time	Food	Amount
Morning	Quality cichlid pellet	Small pinch, eaten within 1 minute
Evening	Frozen brine shrimp or spirulina food	Light portion, no leftovers

Foods to Avoid

Avoid fatty mammal meats, excessive live feeder fish, and random human foods. Do not rely on bloodworm alone. Overuse of rich foods can pollute the water and worsen aggression. If you are comparing species while planning a freshwater fish bundle or tropical fish bundles, feed according to the most sensitive fish in the tank, not the hungriest one.

What Does the OB Convict Cichlid Look Like? Colors, Patterns & Varieties

The standard convict is famous for its barred black-and-grey body, but the OB Convict Cichlid adds a marbled or blotched pattern that can include orange, cream, yellow, charcoal, and black. This is why some hobbyists also search for yellow convict cichlid, pink convict cichlid, or Marble Convict Cichlid when looking for similar fish. No two OB fish are exactly alike, which adds to their appeal.

Typical convict cichlid size in aquaria is around 10-12 cm for many females and 12-15 cm for mature males, though body depth and finnage can make some fish look larger. Males are usually longer and more elongated, with more pointed dorsal and anal fins. Females are often smaller but more colourful, especially around the belly, where orange or peach shades can intensify.

If you are trying to tell convict cichlid male or female, look for body shape and colour. A female convict cichlid often shows stronger orange on the belly and tends to stay a little smaller. Discussions around convict cichlid male vs female and convict cichlid male and female identification usually focus on these differences. In mature fish, males may also develop more extended fin tips and a heavier forehead profile.

Our product photos show the variable marbling you can expect from this line-bred form. If you are searching buy Amatitlania nigrofasciata OB UK, buy OB convict cichlid UK, or buy zebra cichlid OB UK, expect natural variation in the amount of orange and dark blotching. That variation is part of the charm of the Amatitlania nigrofasciata OB form.

What Fish Can Live With OB Convict Cichlids? Compatibility Guide

Convict cichlid tank mates are one of the biggest topics around this species, and for good reason. These fish are hardy, intelligent, and active, but they are also territorial. A peaceful convict cichlid community tank is possible only with careful planning, enough space, and realistic expectations. The biggest issue is not routine aggression alone; it is how dramatically behaviour changes during spawning.

Ideal Tank Mates

The best convict cichlid compatible fish are robust species that can handle similar water chemistry and stand their ground without being relentless bullies. Good examples include medium Central American cichlids and some sturdier New World species. Consider fish such as Thorichthys Maculipinnis - Elliot'S Cichlid -, which is often discussed in the same conversations as firemouth cichlid tank mates. You can also compare with Red Head Severum Cichlid - Heros for larger, calmer display tanks, though severums need more room and careful observation.

Other cichlid options include Yellow Elongatus Cichlid - Chindongo Elongatus, Aulonocara Sp Neon Red Calico Peacock, Kiriza Yellow Cichlid - Tropheus Moorii, and Orange I Blunthead Cichlid - Tropheus, but these are not direct biotope matches and should only be mixed by advanced keepers with a clear plan for water chemistry, diet, and aggression management. For many aquarists, a species tank or carefully chosen Central American setup is safer.

Species to Avoid

Avoid very small, timid fish such as the species people often search under community tropical fish uk, including many tetras. If you are browsing tropical fish for beginners, tropical fish starter, or wondering about adding fish sold alongside buy siamese fighting fish online uk searches, remember that bettas and convict cichlids are a poor mix. Likewise, shrimp and small snails are risky. Very delicate species, slow fancy fish, and long-finned fish should be avoided.

It is also worth saying that convicts are not suitable companions for novelty ideas such as home aquarium sharks uk. Those setups have completely different size, behaviour, and filtration demands. The same applies if you are comparing them with fish from searches like cold water fish for sale uk; these are tropical freshwater cichlids and should not be mixed with coldwater species.

Community Tank Stocking Examples

For a 180-litre tank, a single convict with one similarly robust cichlid may work if territories are clearly divided. For a 240-litre or larger setup, a pair with dither fish is still risky once breeding begins. If you are researching single convict cichlid tank mates, a lone specimen is usually easier to place than a pair. If you are planning convict cichlid tank mates 55 gallon, think in terms of fewer, sturdier fish rather than a busy mixed community.

Species	Compatible?	Notes
Thorichthys Maculipinnis - Elliot'S Cichlid -	⚠️ Caution	Possible in larger tanks with caves and territorial breaks
Pelvicachromis Pulcher - Rainbow Kribensis Cichlid	⚠️ Caution	Similar cave-spawning behaviour can trigger disputes in smaller tanks
Small tetras	❌ Avoid	Too timid and vulnerable, especially at feeding time

If you are building a cichlid display and want a useful cichlid tank mates chart reference point, the OB convict sits in the category of hardy but territorial fish that need space, structure, and close observation. A common comparison is convict cichlid or kribensis; kribs are often easier in smaller community tanks, while convicts show stronger territorial intensity and more dramatic parenting.

How to Breed OB Convict Cichlids: Complete Breeding Guide

The convict is often called the easiest cichlid to breed, and that reputation is well earned. Convict cichlid breeding is frequent, reliable, and fascinating to watch. If you want a practical introduction to breeding cichlid UK hobbyists often recommend, this species is a classic choice. A healthy pair may spawn repeatedly once settled.

Breeding Setup

Use a separate breeding tank if possible, ideally 90-150 litres for a pair, with caves, smooth rock surfaces, and stable water. Keep temperature around 26-27°C and feed a varied, protein-rich diet. Strong pair formation is important because convict cichlid pair bonding is central to successful spawning and fry defence.

Spawning Behaviour

Convict cichlid breeding behavior includes digging, cleaning a cave or rock, lip-locking displays, and intense defence of a chosen area. If you are wondering how often do convict cichlids breed, the answer can be surprisingly often under good conditions. Once a compatible convict cichlid male and female settle, they may spawn every few weeks.

Egg Care & Hatching

The female lays adhesive convict cichlid eggs inside a cave or on a hard surface, and both parents guard them. Eggs usually hatch in about 72 hours, depending on temperature. The wrigglers remain in the nest for another few days before becoming free-swimming convict cichlid fry.

Fry Care & Growth

Convict cichlid fry care is relatively simple because the parents are attentive. Feed newly free-swimming fry with crushed flake, powdered fry food, microworms, or newly hatched brine shrimp. One common question is when to remove convict cichlid fry. If the parents remain calm and the tank is dedicated to breeding, fry can stay with them for a while. If the pair prepares to spawn again or aggression increases, move the fry to a grow-out tank.

Common Breeding Challenges

The main challenge is not getting them to breed but managing aggression. A mismatched pair can fight, and a breeding pair can make life impossible for other fish. This is why many aquarists eventually keep the species in a dedicated setup. If you are trying to identify convict cichlid male or female juveniles, wait for maturity; young fish are harder to sex accurately.

OB Convict Cichlid vs Similar Species: Which Should You Choose?

Choosing between similar cichlids depends on colour preference, tank size, and how much aggression you are prepared to manage. The OB convict is ideal for aquarists who want a hardy fish with bold parenting behaviour and unusual marbling. It is less suitable if you want a peaceful community centrepiece.

Feature	OB Convict Cichlid	Rainbow Kribensis
Max Size	10-15 cm	8-10 cm
Care Level	Easy to moderate	Easy
Temperature	20-28°C	24-27°C
Price	£10.65	Varies
Best For	Hardy cichlid displays, breeding projects	Smaller cichlid communities

If you are deciding between convict cichlid vs firemouth cichlid, firemouths are generally larger, often calmer in the right setup, and better for bigger displays. If you are comparing convict cichlid vs T-bar cichlid, T-bars can be a little less intense in some tanks, though personality varies. For keepers choosing between convict cichlid or kribensis, kribs usually fit mixed community tanks more easily, while convicts deliver stronger pair behaviour and are often the easiest cichlid to breed.

Feature	OB Convict Cichlid	Marble Convict
Pattern	Orange blotch / marbled	Marbled black, white, grey
Temperament	Territorial	Territorial
Best For	Colourful oddball cichlid tanks	Classic convict projects
Care	Very similar	Very similar
Link	This product	Amatitlania Nigrofasciata «Marble» - Marble Convict

Choose the OB form if you want the familiar hardiness of a convict with more decorative colour. It is a great option for aquarists searching exotic tropical fish for sale uk, large tropical fish for sale uk, or a standout freshwater tropical fish for sale uk specimen that still has straightforward care needs.

Common Health Problems in OB Convict Cichlids & How to Prevent Them

A healthy OB convict is alert, responsive, quick to feed, and confident around the tank. Normal convict cichlid behaviour includes digging, patrolling, and investigating decor. Fins should be open, eyes clear, and the body full without bloating. Good colour and a strong feeding response are reliable signs of health.

Common Diseases & Symptoms

Like many convict cichlid freshwater species, they can suffer from whitespot, bacterial infections, fin damage from fighting, and digestive issues linked to poor diet or overfeeding. Hole-in-the-head is less common in well-kept convicts than in some larger cichlids, but poor water quality and nutritional imbalance can still cause long-term problems.

Treatment Options

Start with water quality. Test ammonia, nitrite, nitrate, temperature, and pH before reaching for medication. Minor fin damage often improves with clean water and reduced aggression. Use a separate hospital tank where possible. Because convict cichlid for beginners is a common search, it is worth stressing that most disease outbreaks begin with stress, crowding, or unstable water rather than bad luck.

Prevention Tips

Maintain stable convict cichlid water parameters, avoid overstocking, and feed a varied diet. The species is hardy, but convict cichlid aggression can lead to chronic stress in unsuitable tank mates. If you want a convict cichlid for large tank setup with companions, put more effort into territory design than decoration style.

Quarantine Procedures

Quarantine all new fish for 2-4 weeks. This reduces the risk of introducing parasites and gives you time to observe appetite, waste, and fin condition. It also helps if you are mixing species sourced from different systems, whether you usually buy cichlids online uk, visit a tropical fish shop near me, or compare stock with fish for sale pets at home and tropical fish pets at home listings.

Understanding OB Convict Cichlid Behavior in the Aquarium

The OB convict is active, curious, and highly territorial. Much of its appeal comes from visible intelligence: it learns feeding times, rearranges substrate, and reacts strongly to other fish entering its chosen area. This is one reason it remains popular among aquarists looking for a hardy display fish rather than a passive community species.

Normal convict cichlid behaviour includes digging pits, claiming caves, and displaying to rivals. A lone fish may be assertive but manageable. A pair, however, can become extremely defensive once bonded. This is why discussions around convict cichlid with larger cichlids or single convict cichlid tank mates often produce very different answers; behaviour changes dramatically depending on whether the fish is alone, paired, or breeding.

If you want to see natural behaviour, provide caves, hardscape, and open areas. The fish will patrol the lower half of the aquarium and use the bottom region heavily. In a well-designed setup, you will see courtship cleaning, substrate moving, and coordinated parental care that few beginner-level cichlids match.

Why Buy from Tropical Fish Co?

When ordering an OB convict cichlid for sale UK, the most important factors are health, stability, and accurate expectations. This is not a generic community fish. It needs to arrive in strong condition, with clear feeding response and enough size to settle well after acclimation. Our approach focuses on selecting active fish with good body shape, intact fins, and clean pattern development, whether you are looking for a single specimen, a possible pair, or comparing OB convict online UK options.

Before dispatch, fish are monitored for feeding response and overall condition, then packed in insulated boxes designed for safe tropical fish for sale uk delivery. Seasonal heat packs are used in cold weather, and bagging is planned to reduce stress in transit. This matters with cichlids because a calm arrival often translates into faster feeding and smoother acclimation. For aquarists who usually search tropical fish for sale near me, tropical fish for sale glasgow, or tropical fish for sale in uk, buying online can still be a reliable option when packing and holding standards are right.

We also know buyers compare many routes before they buy fish online: best place to buy tropical fish online, buy live fish online uk free delivery, local stores, classified ads offering free tropical fish, or even rescue listings such as free tropical fish to good home and unwanted tropical fish. The advantage of buying properly conditioned stock is predictability. You know the species, the expected size, and the care requirements from day one.

If you want to buy cichlids online uk, buy OB convict cichlid UK, or compare the OB convict cichlid price UK against other colourful cichlids such as jaguar cichlid for sale uk or even searches for green terror for sale uk, the OB convict offers outstanding value because it combines colour, toughness, and fascinating behaviour in one fish. It is also a far more practical choice for many homes than species requiring large tropical fish tanks for sale uk or specialist chemistry.

You Might Also Like

If you are planning a cichlid setup, compare this fish with the Amatitlania Nigrofasciata «Marble» - Marble Convict for another convict colour form. For a smaller cave-spawning alternative, the Pelvicachromis Pulcher - Rainbow Kribensis Cichlid is worth considering. If you prefer larger display cichlids, look at the Red Head Severum Cichlid - Heros or the Thorichthys Maculipinnis - Elliot'S Cichlid -. Malawi enthusiasts may also enjoy the Aulonocara Sp Neon Red Calico Peacock or Yellow Elongatus Cichlid - Chindongo Elongatus if they are building a different style of cichlid aquarium. For general browsing, explore our wider collection of tropical fish for sale online uk to complete your setup.