Redbelly tilapia
A hardy cichlid from Africa and the Middle East.
The redbelly tilapia is a cichlid native to northern Africa and the Jordan River system. It thrives in fresh and brackish waters, tolerating high salinity and temperature extremes. Introduced globally for food and weed control, it can become invasive and disrupt local ecosystems.
- Tolerates salinity up to 4%, higher than seawater
- Breeding adults have bright pinkish-red bellies
- Both parents guard the nest and young fry
- Can survive water temperatures up to 42.5 °C
- Introduced globally for weed control and food
What it is
This cichlid species features a brownish-olivaceous body with a yellow or white belly. Breeding adults display greenish hues, iridescent blue-green head spots, and bright pinkish-red underparts. It often shows faint horizontal lines and vertical bars when agitated. Adults reach up to 40 cm in length but typically stay smaller. Males grow larger than females. The fish closely resembles the redbreast tilapia, making visual identification difficult without knowing the location.
Where it lives
Native to northern Africa, its range extends from Morocco and the Senegal River to the Congo basin. It inhabits the Nile system from Egypt to Lake Albert and Lake Turkana. In the Middle East, it lives in the Jordan River system and coastal Israel. Introduced populations exist in Asia, Australia, and North America. It prefers shallow vegetated areas but can live in sandy shores or depths up to 30 metres.
How it lives
The diet consists mainly of algae and aquatic or terrestrial plants. It also consumes small invertebrates and fish eggs, while juveniles eat tiny crustaceans. This fish tolerates wide temperature ranges, surviving up to 42.5 °C, though cold winters can kill populations in subtropical zones. It handles salinity up to 4 per cent, exceeding seawater levels, but breeding requires lower salt concentrations. It is one of few cichlids in its native Maghreb and Sahara habitats.
Breeding and life cycle
Both parents dig a nest depression in the substrate or a tunnel in mud. Sometimes eggs are laid on stones. Females release 1,000 to 6,000 eggs per spawning event and may breed multiple times per season. Pairs often form colonies. Both adults guard the eggs and fry. Tropical populations breed year-round with a rainy season peak. In cooler regions like Israel, breeding occurs only in summer when water exceeds 20 °C.
Fish and people
Valued as a food fish, it is farmed and introduced for aquatic vegetation control. In some introduced areas, it becomes invasive and threatens local ecology. The name St. Peter's fish is used in Israel, though it applies to other tilapias too. Paul Gervais named the species after M. Zill, a naturalist who collected the first specimen. Its hardiness makes it suitable for aquaculture in varied conditions.
Status and threats
While not assessed here, introduced populations can harm local species. Genetic studies show most groups are closely related, though some marginal populations differ. The species faces mortality in cold climates outside its tropical range. Conservation concerns focus on its invasive potential rather than decline in native ranges. Hybridisation with spotted tilapia has been recorded.
Questions people ask about Redbelly tilapia
How big does the redbelly tilapia get?
It can reach a maximum length of 40 cm and weigh up to 300 g. However, most adults are smaller, typically measuring no more than 30 cm. In the Middle East, they are often between 12 and 22 cm long.
What does the redbelly tilapia eat?
It primarily feeds on algae and higher plants, including land plants that fall into the water. It also eats small invertebrates and fish eggs. Young fish consume tiny crustaceans extensively as part of their diet.
Can it live in salt water?
Yes, it tolerates high salinities up to 4%, which is higher than typical seawater. However, successful breeding requires lower salt levels, with an upper limit of 2.9% for reproduction to occur effectively.
Who looks after the eggs?
Both parents participate in breeding. They dig a nest together and guard the eggs and fry after spawning. This biparental care helps protect the young from predators in their shallow water habitats.
Good reading and sources
- Redbelly tilapia on WikipediaEncyclopedia
- More photos on Wikimedia CommonsPhotos
- Wikidata recordOpen data
The facts on this page come from the Wikipedia article "Redbelly tilapia", 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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