, 0 0 0 ▁tons , ▁and ▁has ▁decre ased ▁since , ▁reaching ▁ 2 , 0 0 0 ▁tons ▁in ▁ 2 0 0 3 . ▁Due ▁to ▁the ▁commercial ▁importance ▁of ▁the ▁species , ▁many ▁stock ▁enh ancement ▁programs ▁have ▁been ▁util ized ▁to ▁help ▁maintain ▁a ▁successful ▁fish ery . ▁The ▁species ▁is ▁commonly ▁found ▁on ▁sand y ▁b enth ic ▁environments ▁from ▁shall ow ▁water ▁to ▁depth s ▁of ▁up ▁to ▁ 3 5 0 ▁meters . ▁ ▁Bi ology ▁and ▁description ▁ ▁E . ▁is en beck ii ▁has ▁a ▁hard ▁shell ▁and ▁soft ▁sp ines ▁which ▁cover ▁the ▁shell ▁and ▁append ages . ▁can ▁reach ▁over ▁ 1   kg ▁in ▁weight . ▁Er im ac rus ▁is en beck ii ▁is ▁known ▁to ▁feed ▁three ▁to ▁four ▁times ▁in ▁a ▁ten ▁to ▁twelve ▁hour ▁time - span , ▁and ▁can n ib al ism ▁is ▁common ▁for ▁E . ▁is en beck ii ▁in ▁the ▁spring . ▁The ▁car ap ace ▁of ▁E . ▁is en beck ii ▁can ▁reach ▁ 1 0 0 ▁to ▁ 1 2 0   mm ▁in ▁length ▁in ▁adult s . ▁Like ▁the ▁two ▁other ▁species ▁in ▁the ▁same ▁family , ▁the ▁g on op hor es ▁of ▁females ▁are ▁exposed . ▁ ▁In ▁the ▁eastern ▁Ber ing ▁Sea , ▁males ▁typically ▁live ▁in ▁areas ▁of ▁around ▁ 3 . 4   ° C ▁and ▁depth s ▁of ▁around ▁ 6 6 ▁meters , ▁while ▁females ▁can ▁be ▁found ▁in