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#11
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08-21-2009, 08:14 AM
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Re: Giant Isopod
Deep-Sea Gigantism In zoology, deep-sea gigantism, also known as abyssal gigantism, is the tendency for species of crustaceans, invertebrates and other deep-sea-dwelling animals to display a larger size than their shallow-water counterparts. Examples of this phenomenon include the giant isopod, the Japanese spider crab, the king of herrings (an oarfish of up to 11 m), the Seven-arm Octopus, and a number of squid species: the Colossal Squid (up to 14 m in length), the giant squid (up to 13 m), the Robust Clubhook Squid, the Dana Octopus Squid, Galiteuthis phyllura, Kondakovia longimana, and the bigfin squids. It is not known whether this effect comes about as a result of adaptation for scarcer food resources (therefore delaying sexual maturity and resulting in greater size), greater pressure, or for other reasons. 1. Bathynomus Giganteus (Giant Isopod) Maturing to a length between 19 and 37 centimetres (7.5 and 15 in), and maximally reaching a weight of approximately 1.7 kilograms (3.7 lb), giant isopods are a good example of deep-sea gigantism; most other isopods range in size from 1 to 5 centimetres (0.39 to 2.0 in). The isopods don't have much to do. They do not swim around like others in fish tanks. Most often they look as if to be sleeping. Oh, what a life! |