ribbon worm
... that in 1980, a ribbon worm was implicated in the collapse of the Dungeness crab fishery in central California?
... that in 1980, a <b id="mwAVE"><a href="./Carcinonemertes_errans" id="mwAVI" rel="mw:WikiLink" title="Carcinonemertes errans">ribbon worm</a></b> was implicated in the collapse of the <a href="./Dungeness_crab" id="mwAVM" rel="mw:WikiLink" title="Dungeness crab">Dungeness crab</a> fishery in central California?