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Phallichthys amates

Merry Widow (Phallichthys amates) - Tropical Fish for Sale UK

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Peaceful
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Live arrival guaranteed. If they don’t arrive healthy, email us a short unboxing video the same day for a replacement or refund. Packed in oxygenated bags with insulation and heat packs when needed.
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A hardy, peaceful Central American livebearer with attractive markings and easy breeding habits, ideal for community aquariums. Easy care, peaceful. 22-28C, pH 7.0-8.2.

Care at a Glance

Scientific Name
Phallichthys amates
Max Adult Size
up to 5.5 cm
Lifespan
3 years
Care Level
Easy
Temperament
Peaceful
Temperature
22–28°C
pH Range
7–8.2
Hardness
8–20 dGH
Minimum Tank
60L
Diet
Omnivore

Adult size is the maximum length this species reaches at full maturity (scientific sources). The livestock you receive will be younger and smaller. Product-photo provenance and any image-specific limitations are stated on the listing.

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Water Parameters

Maintain these water conditions for optimal health and vibrant colors

Temperature
22–28°C
22°CIdeal28°C
pH Level
7–8.2
7Ideal8.2
Water Hardness
8–20 dGH
8 dGHIdeal20 dGH

Overview

Merry Widow (Phallichthys amates), also known as the Merry Widow Livebearer, is a hardy, peaceful Central American livebearer with attractive markings and easy breeding habits, ideal for community aquariums. Native to Central America, from Guatemala to Panama, this species is prized for its manageable size, peaceful nature, and adaptability. Now available for sale UK from Tropical Fish Co, this charming livebearer is ideal for the community aquarium enthusiast seeking an easy-to-keep, attractive species.

Appearance

The Merry Widow typically reaches around 5.5 cm in total length, making it a small to medium-sized livebearer. The body is robust and deep-bodied, with a pale silver or gold base color marked with dark markings along the flanks and a distinctive dark edge on the dorsal fin. A dark stripe runs through the eye, giving the species a subtle but attractive appearance. Females are generally larger and more robust. Healthy specimens have bright, clear eyes and smooth, undamaged scales.

Natural Habitat

In the wild, Phallichthys amates is native to Central America, from Guatemala to Panama, where it inhabits slow-moving streams, rivers, ponds, and marshes with dense aquatic vegetation. These waters are typically moderately hard, warm, and slightly alkaline. The substrate is composed of fine mud or sand, and the fish spend much of their time among plants and cover, feeding on small invertebrates, algae, and organic detritus.

Aquarium Setup

A well-planted aquarium of at least 60 litres is recommended for a small group of Merry Widows. Use a fine gravel or sand substrate and incorporate plenty of live plants such as Vallisneria, Java fern, Cryptocoryne species, and floating plants to provide cover and hiding places. Ensure good filtration and moderate water movement. A secure lid is advisable, as livebearers can jump when startled. Maintain stable, warm water with slightly alkaline pH.

Water Parameters

  • Temperature: 22-28°C
  • pH: 7.0-8.2
  • Hardness: Moderately hard to hard water preferred
  • Filtration: Good flow, regular partial water changes essential

Feeding

The Merry Widow is an omnivore and thrives on a varied diet. Offer quality flake or micro-pellets as a staple, supplemented with algae-based foods, blanched vegetables, and occasional small frozen or live foods such as daphnia and brine shrimp. Feed twice daily in small amounts to maintain excellent water quality.

Behaviour

This livebearer is peaceful, active, and social, constantly on the move and best kept in a small group. Males will court females continuously, but serious aggression is rare. When kept in proper numbers, the Merry Widow is confident and displays natural behavior. They occupy all levels of the aquarium and are most active during the day.

Top Tip: Best kept in stable, well-filtered water with some plant cover and regular partial water changes. Like many livebearers, it benefits from harder, slightly alkaline water.

Tank Mates

The Merry Widow is suitable for a peaceful community aquarium with other small fish. Good tankmates include other peaceful livebearers, small peaceful community fish, small peaceful catfish, and snails. Avoid large predatory fish, aggressive cichlids, fin-nipping species, very boisterous tankmates, and large shrimp (which may be eaten).

Breeding

Breeding the Merry Widow is straightforward. This is a prolific livebearer that usually breeds readily in warm, clean water. Males use a gonopodium to fertilize females internally, and fry are free-swimming at birth. Provide fine-leaved plants or cover to protect fry from being eaten by adults.

Why Buy from Tropical Fish Co

Tropical Fish Co is a leading UK aquatics specialist offering hardy and attractive livebearers like the Merry Widow direct to your door. Every fish is quarantined, inspected, and dispatched with expert care to ensure it arrives in peak condition. With decades of experience, transparent pricing, and exceptional customer support, we make it easy to add peaceful, easy-to-keep species to your collection. Order online today and enjoy fast, reliable delivery across the UK.

Customer Reviews

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What customers say about ordering from us

  • 4 out of 5Verified buyer

    I have a small group of long finned mountain minnows. So was delighted to be able to order ten of this variety to increase the genetics in my tank . The ones I recieved are healthy but it’s to early to give a verdict on wether they are of a long finned type since they are small currently.

    Gordon Walker · 23 Sept 2026

  • 5 out of 5Verified buyer

    100% success travel and "installation". Pleased with quality of purchase. The Siamese fighter a bit "shy" so have not yet seen him at his best yet but looking good. Happy customer. GG

    George E Garratt · 21 Sept 2026

Reviews of our shop, collected by Judge.me, an independent third-party review collector. Newest first.