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The black tetra (''Gymnocorymbus ternetzi'') also known as the black skirt tetra, petticoat tetra, high-fin black skirt tetra, and black widow tetra, is a freshwater fish of the characin family (Characidae). It is native to the Paraguay and Guaporé River basins of southern Brazil, Argentina, and Bolivia. Growing to about total length, the black tetra has a roughly tetragonal body shape and is greyish in colour, fading from near black at the tail to light at the nose. Two prominent, black, vertical bars appear just posterior to the gills. It is a schooling fish, and requires at least six in a group. The black widow tetra feeds on small crustaceans, insects, and worms. ==In the aquarium== The black skirt tetra is a common fish that is widely available for purchase. Hobbyists often provide live foods such as daphnia and mosquito larvae, and frozen foods like bloodworms. The species reaches sexual maturity at about two years of age. Like most characins, this species spawns by intermittently releasing and fertilizing eggs among plants. It frequently eats its own eggs, so keepers remove the fish after spawning. The Black Skirt Tetra was also used to make genetically modified fish sold as GloFish (fluorescent colored fish). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Black tetra」の詳細全文を読む スポンサード リンク
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