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They have no swim bladder. [3] Some species bear photophores. [6] Their early life development is from large eggs directly into yolk sac juveniles that travel in deep waters. [7] The largest species is the Yokozuna slickhead, Narcetes shonanmaruae, which is also the largest completely bathyal teleost fish. [8] [9]
Alepocephaliformes is an order of marine deep-sea teleost fishes. [2] It was previously classified as the suborder Alepocephaloidei of the order Argentiniformes. [3] [4] [5]As an adaptation to a life in the deep-sea, there is no swim bladder, and the ossification of the skeleton is reduced. [2]
The swim bladder, gas bladder, fish maw, or air bladder is an internal gas-filled organ in bony fish (but not cartilaginous fish [1]) that functions to modulate buoyancy, and thus allowing the fish to stay at desired water depth without having to maintain lift via swimming, which expends more energy. [2]
[37]: p. 219 In freshwater fish the bladder is a key site of absorption for many major ions [38] in marine fish urine is held in the bladder for extended periods to maximise water absorption. [38] The urinary bladders of fish and tetrapods are thought to be analogous while the former's swim-bladders and latter's lungs are considered homologous.
The gill membranes are joined to the isthmus and the gill openings are set widely apart. There is no swim bladder. The counts of vertebrae are 72–89 in Anarhichas and 221–251 in Anarrhichthys. [7] The longest published total length is for Anarrhichthys ocellatus and is 240 cm (94 in). [2]
These are deep water fish that resemble but are not related to barracuda. They are long and slender with pointed snouts. They are hunters with large eyes and sharp teeth. Unlike barracuda, these fish have no swim bladder.
Filled with live plants, substrates, and glimmering schools of fish, a perfectly curated aquarium is an awe-inspiring art form. But the best aquarium pets that aren’t fish prove that our finned ...
There is no swim bladder; instead, these fish maintain buoyancy with large livers rich in oil. The definition of the clade is unclear with respect to fossil chondrichthyans. Some authors consider it as equivalent to Neoselachii (the crown group clade including modern sharks, rays, and all other descendants of their last common ancestor).