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Range and habitat The Nile tilapia is native to larger parts of Africa , except Maghreb and almost all of Southern Africa . It is native to tropical West Africa , the Lake Chad basin, and much of the Nile system, including lakes Tana , Albert and Edward – George , as well as lakes Kivu , Tanganyika , and Turkana , and the Awash and Omo Rivers .
Larvae metamorphose into fry and become benthic-feeding juveniles that are opportunistically herbivorous, detritivorous, or omnivorous, depending on the predominant food types in the habitat. [16] Juvenile milkfish larger than 20 mm (0.79 in) typically bear the characteristics of adults.
There is a dispute based on the taxonomy of the sailfish, and either one or two species have been recognized. [3] [4] No differences have been found in mtDNA, morphometrics or meristics between the two supposed species and most authorities now only recognize a single species, Istiophorus platypterus, found in warmer oceans around the world.
The species suffers various threats, particularly deep-water fishing, increased siltation of the habitat, and pollution. [ 21 ] [ 17 ] Increased human activity specifically along the coastal shelf may lead to enhanced sedimentation and a decrease in the quantity and quality of the complex deep sea structures the coelacanths depend on.
Cyprinidae is a family of freshwater fish commonly called the carp or minnow family, including the carps, the true minnows, and their relatives the barbs and barbels, among others.
Dunaliella is a single-celled, photosynthetic green alga, that is characteristic for its ability to outcompete other organisms and thrive in hypersaline environments. [1] It is mostly a marine organism, though there are a few freshwater species that tend to be more rare. [2]
In Malaysia, it is a highly prized food fish, being one of the most expensive fish in the country, wild specimens can be sold for thousands of ringgit.Due to this they are overfished and are now rare in the wild, further increasing their value and local fishermen's incentive to catch it.
In 1758, Carl Linnaeus was the first to scientifically describe a halfbeak, Esox brasiliensis (now Hemiramphus brasiliensis).In 1775 Peter Forsskål described two more species as Esox, Esox far and Esox marginatus.