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Physically similar to blennies, most jawfish species are small fish (up to 10 cm or 3.9 in) with an elongated body plan. A few species, for example the aptly named giant jawfish (O. rhomaleus), reaches about 0.5 m (1 ft 8 in). Their heads, mouths, and eyes are large in size relative to the rest of their bodies.
It is normally observed in loose schools, but larger fish are more often recorded as pairs or individuals. It is a carnivorous species which preys on prawns and fish. The fish preyed upon are mainly grey mullets, anchovies and drums, and they sometimes feed on polychaetes. The ratio of crustaceans to fish fed on varies with the season.
Total and fork length of a fish. Total length (TL) is the length of a fish measured from the tip of the snout to the tip of the longer lobe of the caudal fin, usually measured with the lobes compressed along the midline. It is a straight-line measure, not measured over the curve of the body.
Large examples are usually greenish blue in colour, while smaller ones are blotched in varying shades of brown. [7] An adult may grow to 60 cm in length and weigh from 1.0 to 3.0 kg. [8] [9] It feeds mainly on small fish and crabs. [10] Blue cod is territorial. [11] Spawning takes place in southern spring.
In the hands of the poets the epithalamium was developed into a special literary form, and received considerable cultivation. Sappho, Anacreon, Stesichorus and Pindar are all regarded as masters of the species, but the finest example preserved in Greek literature is the 18th Idyll of Theocritus, which celebrates the marriage of Menelaus and Helen.
Ostariophysi is the second-largest superorder of fish.Members of this superorder are called ostariophysians.This diverse group contains 10,758 species, about 28% of known fish species in the world and 68% of freshwater species, and are present on all continents except Antarctica.
Gadiform fish range in size from the codlets, which may be as small as 7 cm (2.8 in) in adult length, to the Atlantic cod, Gadus morhua, which reaches up to 2 m (6.6 ft). [ 3 ] The earliest gadiforms are Palaeogadus weltoni from the Maastrichtian of the United States and the undescribed, informally named " Protocodus " from the Early Paleocene ...
The big skate (Beringraja binoculata) is the largest species of skate (family Rajidae) in the waters off North America.They are found along the Pacific Coast from Alaska to Baja California, typically from the intertidal zone to a depth of 120 m (390 ft), and feed on benthic invertebrates and small fishes.