Dusky Damselfish Paul Humanns Fish ID (2nd Edition), page 112, 113
Stegastes fuscus
Family: Danselfish - Pomacentridae
Size: 3-5 in., max. 6 in.
Depth: 5-40 ft.
Distinctive Features: 1. Dorsal and anal fins rounded and rarely extended beyond base of tail. JUVENILE: 2. Brilliant orange wash from snout across npe and about halfway down dorsal fin.
Description: Dark oline-vrown to almost black. Nape area often pale olive. Fainst dark bands on body. Normally have darkish area at upper edge of pectoral fin base. May have light blue outline on rear dorsal and anal fins. JUVENILE: Bluish silver-gray. Blue dot/dash markings on head and back. Dark spot on dorsal fin and another on base of tail, both ringed in white to pale blue.
Abundance & Distribution: Occasional florida, Bahamas, Caribbean; also Bermuda, Gulf of Mexico and south to Brazil.
Habitat & Behavior: Inhabit rocky areas. Territorial; pugnaciously chase away intruders.
Reaction to Divers: Unafraid. Aggresively attempt to move divers from their territory.
Note: Many ichthyologists consider the Brazilian population to be a separate species, S. fuscus, in this case, the correct name for populations to the north would be S. dorsopunicans.
Or you can see the whole thing at:
http://diverlink.com/cgi-bin/anyboard.cgi/forum/?cmd=get&cG=130343037303&zu=313034303133&v=2&gV=0