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Leucism ( / ˈluːsɪzəm, - kɪz -/) [ 2 ][ 3 ][ 4 ] is a wide variety of conditions that result in partial loss of pigmentation in an animal —causing white, pale, or patchy coloration of the skin, hair, feathers, scales, or cuticles, but not the eyes. [ 4 ] It is occasionally spelled leukism. Some genetic conditions that result in a ...
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 ...
Close-up of fish melanophores. Fish coloration is produced through specialized cells called chromatophores. The dermal chromatophore is a basic color unit in amphibians, reptiles, and fish which has three cell layers: "the xanthophore (contains carotenoid and pteridine pigments), the iridophore (reflects color structurally), and the melanophore (contains melanin)". [5]
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 ...
For example, catfish have chemoreceptors across their entire bodies, which means they "taste" anything they touch and "smell" any chemicals in the water. "In catfish, gustation plays a primary role in the orientation and location of food". [75] Cartilaginous fish (sharks, stingrays and chimaeras) use magnetoception.
Airbreathing catfish : Amphibious species of this family may venture onto land in wet weather, such as the eel catfish (Channallabes apus), which lives in swamps in Africa, and is known to hunt beetles on land. [8] Labyrinth fish (Anabantoidei). This suborder of fish also use a labyrinth organ to breathe air.
Countershading, or Thayer's law, is a method of camouflage in which an animal's coloration is darker on the top or upper side and lighter on the underside of the body. [1] This pattern is found in many species of mammals, reptiles, birds, fish, and insects, both in predators and in prey. When light falls from above on a uniformly coloured three ...
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).