Nile TilapiaOreochromis niloticusWhere and when to see them

Nile tilapia is a freshwater cichlid native to parts of Africa, including the Nile basin. It is an important food fish and one of the world's most widely farmed freshwater species. Its deep body, adaptable feeding habits and parental care help it thrive in many warm-water environments. Although introduced widely outside its native range, it is a natural member of the Nile's fish community. Wild populations support fisheries and form part of the food web linking aquatic plants, invertebrates and larger predators.

Size

Up to about 60 cm in total length, though most individuals are considerably smaller.

Weight

Up to about 4.3 kg.

Lifespan

Up to about 9 years.

Status

Least Concern (IUCN).

Nile tilapia often gather in loose groups outside the breeding period. They feed mainly during daylight, grazing surfaces and taking food from the water. During breeding, males establish territories in shallow water and excavate nest depressions in the bottom. A male courts females near his nest and defends the area against rivals. After spawning and fertilization, the female collects the eggs into her mouth. She incubates the eggs and shelters the developing young there, feeding little or not at all during this period. Newly released fry may return to her mouth when threatened. Breeding activity is strongly influenced by water temperature and local conditions.

• Females incubate their eggs in their mouths.
• Males excavate shallow nests in the river or lake bottom.
• Nile tilapia can feed on both suspended plankton and algae growing on surfaces.
• Despite its name, its native range extends beyond the Nile basin.

Wildlife opportunities depend on the river reach, water levels and species. River-specific viewing months have not been confirmed; general species seasons are not a local sighting forecast.

Nile tilapia inhabit rivers, lakes, reservoirs and irrigation channels. In the Nile system, they commonly use warm, shallow margins, sheltered bays and other areas with gentle currents. Vegetation and productive shallows provide feeding opportunities and cover for young fish. Sandy or muddy bottoms offer suitable places for males to excavate nests. They tolerate a range of water conditions, including some salinity and relatively low oxygen, but prolonged cold limits their survival.

Nile tilapia are omnivores with a diet that varies with age and food availability. They consume phytoplankton, attached algae, detritus and plant material. Small aquatic invertebrates and zooplankton also contribute, particularly in younger fish. They obtain food by grazing, picking at the bottom and filtering suspended particles from the water.

Common name

Nile Tilapia

Scientific name

Oreochromis niloticus

Animal group

Fish

Size

Up to about 60 cm in total length, though most individuals are considerably smaller.

Weight

Up to about 4.3 kg.

Lifespan

Up to about 9 years.

Status

Least Concern (IUCN).

Identification

Nile tilapia have a deep, laterally compressed body and a long dorsal fin with a spiny front section. Adults are generally grey to silvery, often with darker vertical bars on the flanks that vary in prominence. Regular dark vertical stripes across the tail fin are a useful identification feature. Breeding males may develop reddish coloration, but separating this species from other tilapias or hybrids can require a close examination.