Feather Duster Worm
Bispira brunnea

f22 @ 1/60S, Nikonos II w 35mm and 1:3 extension tube, Oceanic flash and aluminum flash reflector

"Social Feather Duster," Reef Creature Identification, Paul Humann & Ned Deloach. Grow in clusters. Crowns of radioles arranged in circular patterns, extend from parchment like tubes that are usually exposed. Common, Bahamas and Caribbean. Shy. Instantly retract crowns when approached. If diver waits motionless, for several minutes, crowns may slowly extend and reopen.
Salt River Canyon, St. Croix, U.S. Virgin Islands