Peppermint Goby
Coryphopterus lipernes

f22 @ 1/60s, ASA 25, Kodachrome 25 slide film, Nikonos II w 35mm and 1:1 extension tube, Oceanic flash w aluminum flash reflector

"Coryphopterus," Wikipedia, the free encyclopedia. Coryphopterus is a genus of gobies mostly found in the western Atlantic Ocean though a couple species are found in the Indian and/or Pacific oceans.
Salt River Canyon, St. Croix, U.S. Virgin Islands