Blue lyretail
A colourful West African killifish kept in home aquariums.
The blue lyretail is a small, brightly coloured killifish native to freshwater streams and marshes in Nigeria and Cameroon. Males display striking red spots and yellow-edged fins, making them a popular choice for the aquarium trade.
- Males display wavy red spots and yellow-edged fins.
- Females are plainer and feature brown spots instead.
- Eggs can survive drying out in the mud.
- Submerged eggs hatch in roughly two to three weeks.
- Best kept in species-only aquarium tanks.
What it is
The blue lyretail is a small freshwater killifish found in West Africa. Adult males and females look quite different from each other. Males are larger and show off wavy red spots across their bodies, with yellow edges on their top, bottom and tail fins. Females are plainer, featuring brown spots instead of red. These fish reach a maximum size of about six and a half centimetres. They make their homes in marshes and smaller flowing streams within forest and savanna landscapes, often in areas where water levels change unpredictably.
Where it lives
This species lives only in specific parts of Nigeria and Cameroon. You will find them in the waterways of the Benue and Cross River networks. They prefer shallow, slow-moving waters like wetlands and smaller flowing streams. These environments can be highly unpredictable, sometimes drying out completely. Because of this, the fish inhabit both open savanna zones and shaded forest regions. The type specimen was originally collected at Okwoga, located in the upper reaches of the Cross River in Nigeria.
How it lives
Male blue lyretails are highly territorial and defend their space from rivals. They possess larger, extendable fins compared to the females, which they use to display their bright colours. In the wild, they navigate waterbodies that frequently change, requiring them to adapt to shifting conditions in both forest and savanna ecosystems. Their behaviour in captivity shows they can be aggressive toward slower-moving tankmates.
Breeding and life cycle
These fish use a flexible reproductive method to handle unpredictable water levels. Females lay their eggs on the substrate at the bottom of the water. If the pool dries up, the eggs can survive in the dry mud. When water returns, or if the pool remains full, the submerged eggs hatch in roughly two to three weeks based on water warmth. This dual strategy ensures the young can survive whether their habitat floods or dries out temporarily.
Fish and people
Anglers do not catch this species for food, but it is highly valued in the home aquarium trade. Hobbyists appreciate their bright colours and relatively easy care requirements. Breeders find them simple to spawn in captivity. However, keepers must be careful with tank arrangements. Males can become aggressive toward slower fish. They are best kept in tanks with only their own kind. Without enough females around, males may become frustrated and attempt to chase or mate with other unrelated fish sharing the tank.
Questions people ask about Blue lyretail
Why are blue lyretails kept in species-only tanks?
Males can become aggressive toward slower fish. Without enough females around, they may become frustrated and attempt to chase or mate with other unrelated fish sharing the tank. Keeping them with their own kind prevents this stressful behaviour.
How do their eggs survive when streams dry up?
They use a flexible reproductive method. Females lay eggs on the bottom substrate. If the water dries up, the eggs survive in the dry mud. When water returns, the submerged eggs hatch in roughly two to three weeks based on water warmth.
What is the maximum size of an adult blue lyretail?
These small killifish reach a maximum total length of about six and a half centimetres. Males are generally larger than the females and possess larger, extendable fins to help display their bright colours to rivals and mates.
Good reading and sources
- Blue lyretail on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "Blue lyretail", written by its contributors and used under the CC BY-SA 4.0 licence, and from its Wikidata record (CC0). EveryFish rewrote the text in its own words, with AI assistance, and compares every page with the article to make sure no passage is copied. It may be reused under the same CC BY-SA 4.0 licence with a link back.
It may contain mistakes, and figures change over time. Nothing here is investment or buying advice. If something is wrong, tell us. Last refreshed 2026-11-15.
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