Thursday, October 7, 2010

7 deep-sea fish

7. Long Nosed Chimaera


Rhinochimaeridae, commonly known as long-nosed chimaeras, is a family of cartilaginous fish. They are similar in form and habits to other chimaeras, but have an exceptionally long, conical or paddle-shaped, snout. The snout has numerous sensory nerve endings, and is used to find food such as small fish. The first dorsal fin includes a mildly poisonous spine, used in defence.
Long-nosed chimaeras are found in temperate and tropical seas worldwide, from 200 to 2,000 metres (660 to 6,600 ft) depth. They range from 60 to 140 centimetres (2.0 to 4.6 ft) in maximum total length, depending on species.(

6. Giant Isopod


A giant isopod may be one of approximately nine species of large isopods (crustaceans related to the shrimp and crabs) in the genus Bathynomus. They are thought to be abundant in cold, deep waters of the Atlantic. Bathynomus giganteus, the species upon which the generitype is based, is the largest known isopod and is the one most often referred to by the common name "giant isopod".
French zoologist Alphonse Milne-Edwards was the first to describe the genus in 1879 after fishing a juvenile male B. giganteus from the Gulf of Mexico; this was an exciting discovery for both scientists and the public, as at the time the idea of a lifeless or "azoic" deep ocean had only recently been refuted by the work of Sir Charles Wyville Thomson and others. Females were not recovered until 1891.
Giant isopods are of little interest to most commercial fisheries owing to the typical scarcity of catches and because ensnared isopods are usually scavenged beyond marketability before they are recovered. However, in northern Taiwan and other areas, they are common at seaside restaurants[citation needed], served boiled and bisected with a clean lateral slice. The white meat, similar to crab or lobster in texture, is then easily removed. The species are noted for resemblance to the common woodlouse or pill bug, to which they are related. The few specimens caught in the Americas with baited traps are sometimes seen in public aquaria. (

5. Gulper Eel

gulper eel

Saccopharyngiformes is an order of unusual ray-finned fish superficially similar to eels, but with many internal differences. Most of the fish in this order are deep-sea types known from only a handful of specimens such as the Umbrella Mouth Gulper Eel. Saccopharyngiformes are also bioluminescent in several species. Some, such as the swallowers, can live as deep as 10,000 feet (3,000 m) in the ocean, well into the aphotic zone.
Saccopharyngiforms lack several bones, such as the symplectic bone, the bones of the opercle, and ribs. They also have no scales, pelvic fins, or swim bladder. The jaws are quite large, and several types are notable for being able to consume fish larger than themselves. Their myomeres (muscle segments) are V-shaped instead of W-shaped like in all other fish, and their lateral line has no pores, instead it is modified to groups of elevated tubules.(

4. Angler

angler fish

Anglerfish are the members of the order Lophiiformes (pronounced /ˌlɑːfiːəˈfɔrmiːz/). They are bony fish named for their characteristic mode of predation, wherein a fleshy growth from the fish's head (the esca or illicium) acts as a lure; this is considered analogous to angling.
Some anglerfish are pelagic (live in the open water), while others are benthic (bottom-dwelling). Some live in the deep sea (e.g. Ceratiidae) and others on the continental shelf (e.g. the frogfishes Antennariidae and the monkfish/goosefish Lophiidae). They occur worldwide. Pelagic forms are most laterally (sideways) compressed whereas the benthic forms are often extremely dorsoventrally compressed (depressed) often with large upward pointing mouths.(

3. Dragonfish


The black dragonfish is part of the Malacosteid family. This fish has bioluminescent capabilities. The black dragonfish, unlike almost all the other bioluminescent organisms in the ocean, can glow and perceive a red or blue-green light. Most other marine organisms glow blue because that wavelength of light transmits furthest underwater and most marine organisms lack the pigments which can absorb longer or shorter wavelengths of light and are sensitive only to blue light. The light of the black dragonfish can be such long wavelengths that it is nearly infrared and barely visible to the human eye. The ability to produce this type of light gives the black dragonfish an enormous advantage over its prey. This fish can shine a light to avoid predators or search for prey that does not alert the prey or the predator to the presence of the fish since they cannot see the light of the black dragonfish. This fish lives 1500 meters below the surface. The Viperfish is its cousin. (

2. Fangtooth

ikan fangtooth

 Fangtooths are ferocious-looking deep-sea beryciform fish of the family Anoplogastridae (sometimes spelled "Anoplogasteridae"). With a circumglobal distribution in tropical and cold-temperate waters, the family contains only two very similar species, in one genus, with no known close relatives: the common fangtooth, Anoplogaster cornuta, found worldwide; and the shorthorned fangtooth, Anoplogaster brachycera, found in the tropical waters of the Pacific and Atlantic Ocean. (

1. Viper.

ikan viper

A viperfish is a deepwater fish in the genus Chauliodus, with long, needle-like teeth and hinged lower jaws. They grow to lengths of 30 to 60 cm (12 - 24 inches). Viperfish stay near lower depths (250–5,000 feet) in the daytime and shallow at night. Viperfish mainly stay in tropical and temperate waters. It is one of the fiercest predators in the very deep part of the sea and is believed to attack its prey by luring the victim close to itself with a light producing organ. This organ is called a photophore and is located on the end of its dorsal spine. It flashes this natural light on and off while at the same time moving the dorsal spine around like a fishing rod and hanging completely still in the water, and also uses the voluntary natural light producing organ to communicate to its potential mates and rivals.
Viperfish vary in color between green, silver and black. It uses its fang-like teeth to immobilize its prey, and would not be able to close its mouth because of their length if it were not able to curve them behind its head. The first vertebra behind the head of the viperfish is known to absorb the shock of its attacks, which are mainly targeted against dragonfish and other small creatures. They are able to undergo long periods with scarce or no food.
Viperfish are believed to live up to 30 years[citation needed] but in captivity rarely live more than a few hours. Some species of dolphins and sharks are known to prey upon viperfish. Scientists believe that a viperfish can swim at a speed of two body lengths per second but that is not yet the official speed.(


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