Friday, December 16, 2011

Life of Anglerfish

Life of Sea | Anglerfish | Anglerfish are members of the teleost order Lophiiformes. They are bony fish named for their characteristic mode of predation in which a fleshy growth from the head of the fish serves as a lure, this is considered analogous to fish. Some Anglerfish are pelagic, benthic and others. Some live in the deep sea, and others on the continental shelf. They are everywhere. Pelagic forms are most laterally (sideways) compressed whereas the benthic forms are often extremely dorsoventrally compressed (depressed) often with large upward pointing mouths. The Anglerfish is an incredible example of how living organisms can be a way to survive, even in the most inhospitable surroundings. There are over 200 kinds of fishermen, their name to their way of 'fishing' for their food. A spine of the dorsal fin acts as a 'rod', paid with a fleshy "bait" that is often light. Other fish are attracted to this lure and eaten. 
Scientific classification
Kingdom:     Animalia
Phylum:     Chordata
Class:     Actinopterygii
Subclass:     Neopterygii
Infraclass:     Teleostei
Order:     Lophiiformes

Anglerfish has a massive head, with grotesque features. It has a large crescent-shaped mouth, with plenty of sharp pointed teeth. It has a flat white belly region, the upper half of the body taking a broad expansive posture. Color varies from greenish brown to blackish gray, with speckled and spotted markings. The head and body have a vague outline caused by the presence of numerous small flaps of skin. The gill slits are behind and below the base of the pectoral fins. Along the middle of the line of the head and front part of the body, are a series of separate beams. Above the pectoral fins rise to the first dorsal fin. The main section of the stacks form long spines. The most important of which is normally a fleshy tip that the fish used as bait to lure its prey.
Some Anglerfish, such as the Ceratioid (Ceratiidae, or sea devils), employ an unusual method of coverage. Because humans are presumably locally rare and encounters doubly so, finding a mate is problematic. When scientists first started capturing ceratioid anglerfish, they noticed that all copies are females. These individuals were a few centimeters in size and almost all of them had what appeared to be parasites attached to them. It turned out that these "parasites" were strong men ceratioids reduced. A family Lophiidae is of commercial importance to fisheries in the Northwest of Europe, eastern North America, Africa and the Far East. In Europe and North America, the tail meat of fish of the genus Lophius, known as fish-GOOS (North America) or monkfish, is widely used in cooking, and is often compared to lobster tail in taste and texture. In Asia, especially Korea and Japan, is a delicacy.
Another unusual adaptation in Anglerfish is their sexual dimorphism. The males are very small compared to the females, and live as permanent parasites on the female. The male attaches itself by biting, the body of the female. His mouth fuses with her skin, and blood vessels of the two fish connected. The male is entirely dependent on the female for food. In fact, the man starts to degenerate. Eyes are smaller and he eventually loses. His internal organs disappear. The man is simply a source of sperm. The young are planktonic, with a remarkably elongated fin rays.

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