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Swim bladder disease, also called swim bladder disorder or flipover, is a common ailment in aquarium fish. The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy , and thus to stay at the current water depth without having to waste energy in swimming. [ 1 ]
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.
Spring viraemia of carp virus has been shown to infect a wide variety of fish species including silver carp, grass carp, crucian carp, and bighead carp.It has also been shown experimentally to infect other fish species including northern pike, guppies, zebrafish, and pumpkinseed. [1]
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]
The sucking disc begins to show when the young fish are about 1 cm (0.4 in) long. When the remora reaches about 3 cm (1.2 in), the disc is fully formed and the remora can then attach to other animals. The remora's lower jaw projects beyond the upper, and the animal lacks a swim bladder. [9] Some remoras associate with specific host species.
Nototheniidae species have no swim bladder, however, they have other depth-related adaptations, such as increased fatty tissues and reduced mineralization of the bones, resulting in a body density approaching neutral, to fill a variety of niches. [8] The spleen may be used to remove ice crystals from circulating blood.
The species has 33 to 47 gill rakers on the first gill arch, no teeth, and the inside of the mouth is black. [3] It has a pair of large eyes just above the mouth. The organs of the giant oarfish are concentrated toward the head end of the body, possibly enabling it to survive losing large portions of its tail. It has no swim bladder. [14]
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]