▁irregular ▁lo bes ▁with ▁to oth ed ▁edges ▁and ▁squ ared ▁ends ▁known ▁as ▁cer ata . ▁The ▁inner ▁surfaces ▁of ▁these ▁bear ▁numerous ▁small ▁g ills . ▁At ▁the ▁posterior ▁end ▁of ▁the ▁body ▁there ▁is ▁a ▁fl atten ed ▁d ors al ▁cr est . ▁The ▁skin ▁is ▁smooth ▁except ▁for ▁a ▁few ▁con ical ▁t uber cles . ▁The ▁colour ▁is ▁a ▁d ull ▁yellow ish - b rown ▁or ▁green ish - b rown ▁with ▁some ▁small ▁white ▁mark ings . ▁Sometimes ▁there ▁is ▁a ▁row ▁of ▁tiny ▁bright ▁blue ▁sp ots ▁along ▁each ▁side . ▁ ▁Distribution ▁S cy lla ea ▁pel ag ica ▁occurs ▁glob ally ▁in ▁p ant rop ical ▁o ce ans ▁among ▁floating ▁masses ▁of ▁we ed . ▁It ▁is ▁especially ▁common ▁in ▁the ▁Car ib bean ▁area ▁and ▁G ulf ▁of ▁Mexico ▁and ▁it ▁often ▁gets ▁was hed ▁up ▁onto ▁the ▁beach ▁with ▁sea we ed ▁after ▁storm s . ▁ ▁Bi ology ▁S cy lla ea ▁pel ag ica ▁is ▁nearly ▁always ▁a ▁pel ag ic ▁species ▁but ▁is ▁occasionally ▁found ▁on ▁brown ▁sea we ed ▁anch ored ▁to ▁the ▁se ab ed . ▁It ▁sp ends ▁its ▁life ▁among ▁s arg asso ▁we ed ▁( S arg ass um ▁s pp .) ▁floating ▁in ▁tropical ▁se as ▁where ▁it ▁is ▁well ▁cam ou fl aged . ▁It ▁fe eds ▁by ▁gra zing ▁on ▁the ▁hyd roid s ▁that ▁grow ▁on ▁the ▁we ed ▁and ▁if ▁it ▁gets ▁det ached ▁from ▁the