One of his study sites, located at Mukkaw Bay, contained a community consistently dominated by the same species of mussels, barnacles, and the starfish, Pisaster ochraceus, which preys upon the ...

In a subsequent paper, he designated the Pisaster starfish a “keystone species,” referring to an architectural keystone: the wedge-shaped stone atop an arch that, once inserted, prevents the ...

The sea star—often called a starfish, though it's no more a fish ... But despite its apparent lethargy,Pisaster ochraceus serves as a top predator of the intertidal zone—tiger of the tide ...