An eel is any kind of fish concerning the order Anguilliformes, which consists of four suborders, 20 families, 111 category and also about 800 species. The majority of eels are killers. The term "eel" (originally referring to the European eel) is additionally made use of for other similarly designed fish, such as electric eels as well as spiny eels, but these are not participants of the Anguilliformes order.
Eels are extended fish, ranging in size from 5 centimeters (2.0 in) in the one-jawed eel (Monognathus ahlstromi) [uncertain-- review] to 4 m (13 feet) in the slender gigantic moray. Adults range in weight from 30 g (1.1 oz) to over 25 kg (55 lb). They have no pelvic fins, and also several varieties likewise do not have pectoral fins. The dorsal and also rectal fins are fused with the caudal fin, forming a single bow running along much of the size of the animal.
Most eels reside in the superficial waters of the ocean and also burrow right into sand, mud, or amongst rocks. A majority of eel species are nighttime, therefore are rarely seen. Often, they are seen living together in holes, or "eel pits". Some species of eels also stay in much deeper water on the continental shelves as well as over the slopes deep as 4,000 m (13,000 ft). Only participants of the Anguilla frequently live in fresh water, but they, as well, return to the sea to breed.
The heaviest real eel is the European conger. The max size of this varieties has been reported as getting to a length of 3 m (10 feet) and a weight of 110 kg (240 lb). Various other eels are much longer, however do not weigh as considerably, such as the slim huge moray which gets to 4 m (13 feet).
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