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bycatch

by·catch [ b kàch ] (plural by·catches)


noun 
Definition:
 
1. incidental fish caught with targeted species: the part of a fishing vessel's catch that consists of fish and other ocean life forms that it was not targeting and cannot use. The by-catch is usually discarded at sea.

2. surplus fish caught unintentionally: fish that are caught unintentionally in addition to the required species

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