Are an infranclass of ray–finned fishes that arose in the Triassic period. Making up 96 percent of all known fish species, this diverse groups includes about 40 orders and 448 families.
They inhabit oceans at all depths, estuaries, rivers, lakes and swamps. They range in size from the giant oarfish,
Measuring 25 feet (7.6m) or more, and the ocean sunfish, weighing over 2.2 short tons (2 tonnes), to the male anglerfish photocorynus spiniceps, just 0.24 inches (6.2mm) long. Teleost can be torpedo-shaped, flattened (vertically or horizontally) or cylindrical and some like the anglerfish and seahorse, have unique Shapes. They can protrude their jaws, enabling them to grab prey and draw into their mouth. Depicted in art over centuries, teleost are economically important to humans. They are harvested for food, Captured for sport kept in aquariums,especially in the fields of genetics and developmental biology.
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