Sponge Brittle Star
Ophiothrix suensonii

f22 @ 1/60s, Ektachrome 64 slide film, ASA:64, Nikonos II w 35mm and 1:2 extension tube, Oceanic flash and aluminum flash reflector

"Ophiothrix suensoni," Wikipedia, the free encyclopedia. Ophiothrix suensoni is a common species throughout the Caribbean Sea and Gulf of Mexico from Bermuda and Florida south to Venezuela and Brazil. It is found at depths ranging from 3 to 450 metres (9.8 to 1,476.4 ft). It is always associated with sponges such as the red tree sponge (Haliclona compressa), soft corals or gorgonians.
Salt River Canyon, St. Croix, U.S. Virgin Islands