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Burchia semiinflata snails
cup corals on encrusting blue sponge
cup corals, sea slug Doriopsilla albopunctata with yellow sponge
scallop Crassadoma giganteus
sea slug Flabellina iodinea
Macrocystis kelp holdfast, sheltering brittle stars Ophiothrix spiculata, who wave their arms out to feed. If unsheltered, these brittle stars would get eaten, so the intricate rooting structure of a kelp holdfast is a safe haven.