<Li> <P> The ochre sea star was the first keystone predator to be studied . They limit mussels which can overwhelm intertidal communities . </P> </Li> <P> The ochre sea star was the first keystone predator to be studied . They limit mussels which can overwhelm intertidal communities . </P> <Li> <P> Colorful sea lilies in shallow waters </P> </Li> <P> Colorful sea lilies in shallow waters </P>

Marine animal with soft bodies and no backbone