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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 ...
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]
Micromyzon akamai appears to have a patchy distribution. It has been found in the Amazon River basin as well as the lower Tocantins River. [2]Micromyzon akamai inhabits channels of the white-water rivers on sandy substrates at a depth of about 5–20 metres (16–66 ft).
Synodontis granulosus is a species of upside-down catfish endemic to the Democratic Republic of the Congo, Burundi, Zambia, and Tanzania, where it is only known from Lake Tanganyika. [ 2 ] [ 3 ] It was first described by Belgian-British zoologist George Albert Boulenger in 1900, from specimens collected at multiple points along the shore of ...
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 ...
Bagarius species have the same general colour pattern consisting of three darkly pigmented bands or blotches on the body. Irregularly placed spots may also be present on the body. The fin pigmentation varies from species to species, from plain, to spotted, to slightly or heavily barred. [5]