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The clown featherback (Chitala ornata), also known as the clown knifefish and spotted knifefish, is a nocturnal species of tropical fish with a long, knife-like body. This knifefish is native to freshwater habitats in Cambodia, China, Hong Kong, Laos, Macau, Thailand, and Vietnam, [2] but it has also been introduced to regions outside its native range. [1]
Tank size Tank size Temperature range pH range Water Hardness Harlequin rasbora: Trigonostigma heteromorpha: 5 cm (2.0 in) Also known as Harlequin tetra or Harlequin barb. Glowlight rasbora: Trigonostigma hengeli: 5 cm (2.0 in) Red-striped rasbora: Trigonopoma pauciperforata: 7.5 cm (3.0 in) 22–29 °C (72–84 °F) Trigonopoma gracile: 5.5 cm ...
A lid is needed as they have been known to jump out. Black Ghost knifefish get to a maximum size of 50 cm (20 in) in the wild, but usually stop growing at 30 cm (12 in) in home aquaria, although they may grow to 38 cm (15 in) in a larger tank. They should be provided with a shelter (such as a plastic tube or driftwood) in which to hide.
The remaining males move up a rank in the hierarchy. Clownfish live in a hierarchy, like hyenas, except smaller and based on size not sex, and order of joining/birth. [citation needed] Anemonefish lay eggs on any flat surface close to their host anemones. In the wild, anemonefish spawn around the time of the full moon.
They vary greatly in size, ranging from about 15 cm (6 in) in total length in the smallest species to 60 cm (2 ft) in the largest. [2] It has been claimed that Apteronotus magdalenensis is up to 130 cm (4.3 ft), [ 1 ] but this is not supported by recent studies, which indicate that it does not surpass about 50 cm (1.6 ft).
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The body of these fish is unusual; it is ventrolaterally flattened and elongated, giving the appearance of a knife blade. The caudal and anal fins are fused and run from beneath the gill opening to the pointed end of the body, creating a uniform, skirt-like fin. This appendage gives the animal superior control in the water, as it is able to ...
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