Land Crab, (African) rainbow crab, (Nigerian) moon crab, Patriot crab (Cardisoma armatum) — 8-12cm

Overview of Land Crab, (African) rainbow crab, (Nigerian) moon crab, Patriot crab

The land crab, scientifically known as Cardisoma armatum, a striking, colorful terrestrial crab that thrives in a warm, humid paludarium with plenty of land, hiding places, and a varied diet.. Cardisoma armatum is a species of terrestrial crab.

Native to West Africa, especially coastal regions and brackish/terrestrial habitats of Nigeria and surrounding areas, this moderate-care species belongs to the Gecarcinidae family and has earned a loyal following among UK aquarists for its unique characteristics and manageable requirements.

Appearance and Distinguishing Features

The Land Crab, (African) rainbow crab, (Nigerian) moon crab, Patriot crab is a striking terrestrial crab with vibrant coloration including blue, purple, orange, and red tones. Their impressive carapace and powerful claws make them a fascinating addition to a paludarium setup.

At Tropical Fish Co, we select only the healthiest specimens with vibrant coloration and active behavior, ensuring you receive premium quality fish for your aquarium.

Natural Habitat and Origin

In the wild, Cardisoma armatum inhabits west africa, especially coastal regions and brackish/terrestrial habitats of nigeria and surrounding areas. Understanding their natural environment helps us replicate optimal conditions in the home aquarium.

West African waters range from acidic blackwater streams to brackish coastal regions. The diverse habitats have produced an incredible variety of fish species adapted to specific ecological niches.

Aquarium Setup and Requirements

A minimum tank size of at least 75, preferably larger (around 100+ for a single adult) litres is essential for housing Land Crab, (African) rainbow crab, (Nigerian) moon crab, Patriot crab. Larger aquariums provide more stable water chemistry and greater swimming space, both critical for long-term health.

This is a terrestrial species requiring a paludarium with at least 70-80% land area. Provide deep, moist substrate (10-15 cm) for burrowing, multiple hiding places, and a shallow water area for drinking and bathing. Temperature and humidity must be carefully maintained.

Invest in quality filtration capable of turning over the tank volume 4-6 times per hour, and perform regular 25-30% water changes weekly to maintain pristine conditions.

Water Parameters and Chemistry

Maintaining correct water parameters is crucial for the health of Land Crab, (African) rainbow crab, (Nigerian) moon crab, Patriot crab:

• Temperature: 24-28C
• pH Range: 7.0-8.5
• Hardness: See species-specific requirements
• Ammonia/Nitrite: 0 ppm (zero tolerance)
• Nitrate: Below 20 ppm ideally

Moderately soft to slightly hard water suits this adaptable species. Regular water testing and gradual parameter adjustments ensure long-term stability.

Invest in quality test kits and check parameters weekly. Stability is more important than hitting exact numbers - avoid sudden changes that stress fish.

Feeding and Nutrition

As a omnivore, Land Crab, (African) rainbow crab, (Nigerian) moon crab, Patriot crab requires a carefully balanced diet to maintain optimal health and coloration.

Offer a varied omnivorous diet of quality crab pellets, algae, blanched vegetables, leaf litter, fruits in moderation, and occasional protein such as bloodworms, earthworms, insects, or small pieces...

Vary the diet between quality flakes/pellets, frozen foods (bloodworms, daphnia, brine shrimp), and occasional fresh vegetables. Nutritional variety promotes vibrant colors, strong immunity, and natural behavior.

Remove uneaten food after 3-5 minutes to prevent water quality degradation. A single weekly fasting day can benefit digestion and overall health.

Behaviour and Temperament

The Land Crab, (African) rainbow crab, (Nigerian) moon crab, Patriot crab is classified as semi-aggressive, though individual personality can vary with age, tank size, and stocking density.

Expect territorial behavior, especially during breeding or in undersized tanks. Provide ample space and visual barriers to reduce conflict. This species may view smaller fish as food.

This is a terrestrial crab that needs a land-dominant paludarium with deep, moist substrate for burrowing, secure escape-proof lid, access to both land and shallow water, and high humidity. Do not...

Compatible Tank Mates

Choose tankmates carefully to ensure a harmonious community aquarium:

Compatible species include:

• Best kept alone

Avoid housing with:

• Other crabs
• Shrimp
• Snails
• Small fish
• Slow or bottom-dwelling fish

Always research specific compatibility and introduce new fish gradually, monitoring behavior closely during the first few weeks.

Breeding and Reproduction

Breeding is uncommon in home aquaria because this species has complex reproductive needs and typically requires very specific brackish-to-marine conditions for larval development.

Why Buy Land Crab, (African) rainbow crab, (Nigerian) moon crab, Patriot crab from Tropical Fish Co UK

When you choose Tropical Fish Co for your land crab purchase, you benefit from:

• Premium Quality: Every fish is quarantined, health-checked, and feeding well before dispatch
• Expert Selection: We hand-pick active, vibrant specimens with excellent coloration
• Safe Delivery: Specialist courier service with heat packs and double-bagged packaging
• Live Arrival Guarantee: We stand behind every shipment with our comprehensive guarantee
• Ongoing Support: Expert care advice available whenever you need it

With decades of combined experience in the UK aquarium trade, we understand what makes healthy, thriving fish. Our Land Crab, (African) rainbow crab, (Nigerian) moon crab, Patriot crab specimens are among the finest land crab available online today.

Order with confidence knowing you're purchasing from a trusted UK specialist. We're passionate about connecting aquarists with exceptional fish for sale UK wide.