Brittle star arm on sponge with zoanthids

''Ophiothrix suensoni'', Suenson's brittle star or the sponge brittle star, is a species of marine invertebrate in the order Ophiurida. It is found in the Caribbean Sea and Gulf of Mexico. It is included in the subgenus ''Acanthophiothrix'' making its full scientific name ''Ophiothrix suensoni''.