Crabs are generally covered with a thick exoskeleton, composed primarily of highly mineralized chitin, and armed with a single pair of chelae (claws). Crabs are found in all of the world's oceans, while many crabs live in fresh water and on land, particularly in tropical regions. Crabs vary in size from the pea crab, a few millimetres wide, to the Japanese spider crab, with a leg span of up to 4 metres (13 ft). About 850 species of crab are freshwater, terrestrial or semi-terrestrial species; they are found throughout the world's tropical and semi-tropical regions.
Quick Answer. A pluot is a hybrid fruit created by cross-breeding a plum and an apricot. Pluots do not occur in nature and were first created in the late 20th century.
Whatâs the Difference Between a Pluot and an Aprium? Botanists call a cross between two or more plants an interspecific, and thatâs what pluots and apriums are. Both are part plum and part apricot, but of course itâs way more involved than that. They are âcomplex crosses,â says Ed Laivo, marketing manager for the Dave Wilson Nursery, the exclusive U.S. distributor of both fruits.