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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 Hindi and Kumaoni name of mahāsir, mahāser, or mahāsaulā is used for a number of fishes of the group. Several sources of the common name mahseer have been suggested: It has been said to be derived from Sanskrit, while others claim it is derived from Indo-Persian, mahi- fish and sher- tiger or "tiger among fish" in Persian.
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 .
The following two subfamilies and five genera are classified within the family Malacanthidae, in total it contains 45 species. [10] [3] [11] [1]subfamily Latilinae Gill, 1862 ...
In marine environments, a nursery habitat is a subset of all habitats where juveniles of a species occur, having a greater level of productivity per unit area than other juvenile habitats (Beck et al. 2001). Mangroves, salt marshes and seagrass are typical nursery habitats for a range of marine species.
They are more diverse than coastal demersal fish, since there is more habitat diversity. Further out are the abyssal plains. These flat, featureless regions occupy about 40 per cent of the ocean floor. They are covered with sediment but largely devoid of benthic life . Deep sea benthic fishes are more likely to associate with canyons or rock ...
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.
Crazy fish are classified under the genus Butis in the family Butidae, which was formerly considered a subfamily, Butinae, of the family Eleotridae (sleeper gobies). They belong to the order Gobiiformes, [8] which to some authorities is a suborder of the order Perciformes called Gobioidei.