Search results
Results from the WOW.Com Content Network
Found almost exclusively in fresh water (the only exceptions are species that occasionally may visit brackish water to feed), these mostly nocturnal fish are capable of producing electric fields to detect prey, for navigation, communication, and, in the case of the electric eel (Electrophorus electricus), attack and defense. [2]
The gwyniad (Coregonus pennantii) is a freshwater whitefish native to Bala Lake (Welsh: Llyn Tegid) in northern Wales.. The population is threatened by deteriorating water quality and by the ruffe, a fish introduced to the lake in the 1980s and now eating the eggs and fry of gwyniad.
It is a nocturnal fish like many catfish. It feeds on living, as well as dead, animal matter (such as insects, plankton, snails, crabs, shrimp, other invertebrates, birds, reptiles, amphibians, small mammals, other fishes, and eggs) and plant matter such as fruit and seeds. [7]
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]
The flashlight fish (Photoblepharon steinitzi) is a species of anomalopid fish of the order Beryciformes. It is native to the western Indian Ocean and the Red Sea where it is found near coral reefs. It is a nocturnal predator, hiding in crevices and caves by day and emerging to feed at night.
The burnt-tailed barb is closely related to the bala shark (B. melanopterus).It differs from its congener by a shorter snout, grooves which are posteriorly directed at rictus curved (vs. straight in the bala shark), and narrower black margins on the pelvic and anal fins (on distal third or less compared to the bala shark where the black margins are on distal half or more).
The African brown knifefish is nocturnal and uses the nerve-filled pits running down its body to navigate lightless waters. In addition, the eyes of this fish are large in relation to its body size. They provide the animal with excellent night vision. The mouth is large, and the fish also possesses a pair of short barbels used in hunting. The ...
As fish are a hugely diverse taxon, with over 30,000 described species of fish, the sleep behaviours and characteristics differ between species. For a long time, researchers overlooked sleep behaviour in fish and other ecothermic taxa, [3] as the definition of sleep included slow-wave cortical activity and rapid eye movement.