Search results
Results from the WOW.Com Content Network
Catfish (or catfishes; order Siluriformes / s ɪ ˈ lj ʊər ɪ f ɔːr m iː z / or Nematognathi) are a diverse group of ray-finned fish.Named for their prominent barbels, which resemble a cat's whiskers, catfish range in size and behavior from the three largest species alive, the Mekong giant catfish from Southeast Asia, the wels catfish of Eurasia, and the piraíba of South America, to ...
External anatomy of a bony fish (Hector's lanternfish): 1. operculum (gill cover), 2. lateral line, 3. dorsal fin, 4. adipose fin, 5. caudal peduncle, 6. caudal fin, 7. anal fin, 8. photophores, 9. pelvic fins (paired), 10. pectoral fins (paired) Internal anatomy of a bony fish. Fish anatomy is the study of the form or morphology of fish. It ...
Many species of Loricariidae, a family of catfish, have a modified iris called an omega iris. The top part of the iris descends to form a loop which can expand and contract called an iris operculum; when light levels are high, the pupil reduces in diameter and the loop expands to cover the center of the pupil giving rise to a crescent shaped ...
Fish physiology is the scientific study of how the component parts of fish function together in the living fish. [2] It can be contrasted with fish anatomy, which is the study of the form or morphology of fishes. In practice, fish anatomy and physiology complement each other, the former dealing with the structure of a fish, its organs or ...
Vision is an important sensory system for most species of fish. Fish eyes are similar to those of terrestrial vertebrates like birds and mammals, but have a more spherical lens. Their retinas generally have both rod cells and cone cells (for scotopic and photopic vision), and most species have colour vision.
Synodontis membranaceus, known as the moustache catfish, [2] is a species of upside-down catfish that is native to northern Africa. [3] It was first described by French naturalist Geoffroy Saint-Hilaire in 1809 as Pimelodus membranaceus, from specimens obtained in the Nile River. [2] The species name membranaceus refers to membranes present on ...
The flathead catfish grows to a length of 155 cm (61 in) [8] and may weigh up to 55.79 kg (123.0 lb), [9] making it the second-largest North American catfish (after the blue catfish, Ictalurus furcatus). [9] More commonly, adult length is about 15–45 inches (38–114 cm). [6] Its maximum recorded lifespan is 28 years. [10]
Asterophysus batrachus, the gulper catfish or ogre catfish, is a species of catfish (order Siluriformes) of the family Auchenipteridae. It is native to the Rio Negro and Orinoco basins in Brazil, Colombia and Venezuela, [1][2] where mostly found in slow-moving waters with many submerged structures. [3] It is currently the only recognized ...