wrinkled star
... that the wrinkled star broods some of its eggs in a brood chamber?
... that the <b id="mwARE"><a href="./Pteraster_militaris" id="mwARI" rel="mw:WikiLink" title="Pteraster militaris">wrinkled star</a></b> <a href="./Egg_incubation" id="mwARM" rel="mw:WikiLink" title="Egg incubation">broods</a> some of its eggs in a brood chamber?