Ostrich Plume Hydroids among blue and orange Sponges.
 Isla Guy Fawkes, Islas Galápagos, Ecuador - Depth 45 feet

* Ostrich Plume Hydroids (Aglaophenia diegensis ?)  rise  among mottled blue, orange, white, and light tan Sponges. In the lower left one can make out green mounds of Bugula.  Note that the feathers of the  hydroids are dotted with rice-like, pale yellow corbulae.  These corbulae serve a function in the hydroid  reproductive process. 

 Isla Guy Fawkes, Islas Galápagos, Ecuador - Depth 45 feet or 14 meters