▁in ▁California ▁holding ▁various ▁species ▁of ▁sea ▁stars , ▁other ▁species ▁started ▁displaying ▁similar ▁sympt oms . ▁The ▁och re ▁star ▁( P is aster ▁och race us ) ▁was ▁the ▁first ▁affected . ▁Most ▁of ▁these ▁developed ▁sympt oms , ▁lost ▁arms ▁and ▁died ▁over ▁the ▁course ▁of ▁a ▁week ▁or ▁so . ▁Later ▁the ▁rain bow ▁star ▁( Or th aster ias ▁ko eh ler i ) ▁developed ▁the ▁disease ▁and ▁died , ▁but ▁the ▁bat ▁star ▁( P ati ria ▁mini ata ) ▁and ▁le ather ▁star ▁( D erm aster ias ▁im br ic ata ), ▁which ▁were ▁living ▁in ▁the ▁same ▁tank ▁and ▁had ▁been ▁sc av eng ing ▁on ▁the ▁corps es , ▁showed ▁no ▁ill ▁effects . ▁At ▁Natural ▁Br id ges ▁State ▁Marine ▁Reserve ▁in ▁California , ▁the ▁och re ▁star ▁is ▁normally ▁a ▁very ▁common ▁resident ▁on ▁the ▁muss el ▁b eds , ▁but ▁by ▁November ▁ 2 0 1 3 ▁it ▁was ▁reported ▁to ▁have ▁completely ▁disappeared . ▁ ▁There ▁have ▁been ▁signs ▁of ▁some ▁recovery ▁of ▁och re ▁sea ▁star ▁populations ▁( P is aster ▁och race us ), ▁with ▁higher ▁numbers ▁of ▁ju ven ile ▁sea ▁stars ▁in ▁the ▁inter tid al ▁than ▁had ▁been ▁previously ▁common , ▁especially ▁for ▁northern ▁sites ▁along ▁the ▁Pacific ▁coast . ▁However , ▁the ▁bi om ass ▁and ▁the ▁function ▁of ▁och re ▁sea ▁stars ▁in ▁their ▁communities , ▁such ▁as ▁being ▁important ▁pred ators ▁of ▁muss els , ▁has ▁remained ▁lower ▁than ▁pre -