[vc_row][vc_column][vc_column_text]Crabs generally are 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. There are different kinds and varieties of crab sizes, some live in the water while about 850 species of crab are freshwater, terrestrial or semi-terrestrial species; they are found throughout the world’s tropical and semi-tropical regions.
In Nigeria, they are commonly found at coastlines both aquatic and semi-aquatic, scarcely are terrestrial crabs can be found. Crabs are enemies of non-crab fishermen because they disturb their activities by crunching their nets for fishes.
For the past few years due to the development of aquaculture in Nigeria, which create the atmosphere for fish feed production, crabs are also primary source of protein and other mineral nutrients.
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