The skull of fishes is formed from a series of loosely connected bones. Lampreys and sharks only possess a cartilaginous endocranium, with both the upper and lower jaws being separate elements. Bony fishes have additional dermal bone, forming a more or less coherent skull roof in lungfish and holost fish. The simpler … See more Most bony fishes have two sets of jaws made mainly of bone. The primary oral jaws open and close the mouth, and a second set of pharyngeal jaws are positioned at the back of the throat. The oral jaws are used … See more Pharyngeal jaws are a second set of jaws distinct from the primary (oral) jaws. They are contained within the throat, or pharynx, of most bony fish. They are believed to have originated, in a similar way to oral jaws, as a modification of the fifth gill arch which no longer … See more Jaws provide a platform in most bony fish for simple pointed teeth, however, there are many exceptions. Some fish like carp and zebrafish have pharyngeal teeth only. Sea horses, pipefish, and adult sturgeon have no teeth of any type. In fish, Hox gene expression … See more The appearance of the early vertebrate jaw has been described as "a crucial innovation" and "perhaps the most profound and radical evolutionary step in the vertebrate history". Fish without jaws had more difficulty surviving than fish with jaws, and most … See more Lower In vertebrates, the lower jaw (mandible or jawbone) is a bone forming the skull with the cranium. In See more Cartilaginous fishes (sharks, rays and skates) have cartilaginous jaws. The jaw's surface (in comparison to the vertebrae and gill arches) needs … See more Salmon Male salmon often remodel their jaws during spawning runs so they have a pronounced curvature. These hooked jaws are called kypes. The purpose of the kype is not altogether clear, though they can be used to establish … See more WebJul 8, 2014 · Pacus closely resemble some piranha species in size and coloration, and thus, are often sold at fish markets as, “vegetarian piranhas,” as well as other less flattering nicknames. 9. When ...

10 Rare and Weird Deep Ocean Fish by Rolif Refo Medium

WebOct 13, 2016 · These fish include species that have teeth relatively greatest among the species size. Her teeth were used to prey on and chew food, to be able to devour larger prey. 5. WebJul 31, 2012 · These large fish, which are also known as the broadbill or broadbill swordfish, have a distinctive pointed, sword-like upper jaw that is over 2 feet long. This "sword," which has a flattened oval shape, is used … greenthink consulting

Predatory Fish: From Their Jaws, To The Strategy Of "Shoaling"

WebTherefore, herbivorous fishes have amylase activities in the gut much higher than in carnivorous species. Tilapia have two types of teeth: jaw teeth and pharyngeal teeth. … WebThe dentary of the ghost knifefish species Sternarchogiton nattereri (family Apteronotidae) has upper and lower pharyngeal tooth plates bearing 9-11 and 7-9 teeth, ... Fish jaw: The primary oral jaws open and close the … fnb soshanguve