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Mastacembelus is a genus of many species of spiny eel fish from the family Mastacembelidae.They are native to Africa (c. 45 species) and Asia (c. 15 species). [4] Most are found in rivers and associated systems (even in rapids [5]), but there are also species in other freshwater habitats and a particularly rich radiation is found in the Lake Tanganyika basin with 15 species (14 endemic).
Zig-zag eels do well in freshwater or slightly brackish aquatic environments (produced by adding two teaspoons of sea salt (not iodized) per 2 + 1 ⁄ 2 gallons of water) [9] with 6 to 25 dH water hardness, with pH readings ranging from 6 to 8, and temperatures that are maintained between 73 and 81 °F (23 to 27 °C).
Macrognathus siamensis, the peacock eel or spotfin spiny eel, is a spiny eel found in freshwater habitats throughout Southeast Asia. They are commercially important as food and aquarium fish. [ 1 ] [ 2 ]
Spiny eels generally inhabit soft-bottomed habitats in fresh and occasionally brackish water. Some species burrow in the substrate during the day or for certain months and have been found buried in soil in drying periods. [4] These fish have an eel-like body. The largest species can reach a maximum length of 1 m (3.3 ft). [3]
The name spiny eel is used to describe members of two different families of fish: the freshwater Mastacembelidae of Asia and Africa, and the marine (and generally deep sea) Notacanthidae. Both are so-named because of their eel -like shape and sturdy fin spines.
Macrognathus aral, the one-stripe spiny eel, is a small fish from Pakistan, India, Bangladesh, Nepal and Myanmar. It usually is found in running and stagnant waters of freshwater and brackish waters. It is 63.5 cm (25.0 in) in length. [2] After mating, eggs are deposited by attaching on to algal masses. [2]
The eel is endemic to Lake Tanganyika and can commonly be found along shores. It is also found in intermediate zones. [3] M. ellipsifer prefers coastal waters with a sandy, rock, or a muddy bottom. The species environment is benthopelagic freshwater. [2] M. ellipsifer eats small fish in the wild, and is a nocturnal species.
Macrognathus pentophthalmos, the Sri Lanka five-eyed spiny eel, is a small species of spiny eel that is endemic to freshwater habitats in Sri Lanka.Described as a common species as recently as 1980, for unknown reasons its population rapidly declined in the following years and there are no recent confirmed records. [3]