THIRTEENTH. ANNUAL REPORT 15) 
dark reddish brown, yellow of tips of pectoral fins intensifies, also 
the black tips of dorsal, caudal, ventrals and anal. The red spots 
remain very bright. 
Pale phase: The whole fish pale white with heavy black 
blotches. 
Frequently all these phases may be observed in a single tank 
within five minutes, without artificial disturbance of the speci- 
mens. 
Gac. (Mycteroperca microlepis?) Black phase: Uniformly 
dusky black; no marks anywhere. 
Pale phase: Uniformly pale white, everywhere covered with 
irregular rings, ovals, half circles, triangles and blotches of dusky 
brown, extending partly on fins. 
This species has also one or two intermediate phases. 
YELLOW-FIN GROUPER, (Mycteroperca vencenosa). Pale phase: 
Uniformly pale white with mere indications of dark blotches 
down to median line. Below, small dark spots, also faintly indi- 
cated. All fins pale and colorless, with narrow dark margins 
composed of dusky spots on dorsal, caudal and anal. All red 
of body and yellow of pectorals absent. 
Dark phase: Dusky gray, under parts spotted with bright red, 
pectorals tipped with clear yellow, all other fins heavily black- 
bordered, considerable red ground color on back and tail. Numer- 
ous dusky blotches on body. 
Alarm phase: Same as preceding, but pale above median line, 
darker below. Red on under parts and tail more intense. Dark 
spots of lower body nearly uniting into large dark blotches. Dark 
spots of upper body intensely black. 
These are the principal phases, but there are several others; 
one of which shows the body white below level of eye, with very 
dark blotches above. Two phases, one dark, the other a phase of 
the photographic tank, are shown on plate 8. The upper figure 
was colored by the artist from the same photograph as the lower. 
BLack Grouper, (Mycteroperca bonact).* Phase 1. Uni- 
formly creamy white, anal and caudal black-bordered, with an 
outside narrow edging of white. 
Phase 2. Entirely pale, with about eight vertical blackish bands, 
each broken into three or four nearly square or rectangular areas. 
Phase 3. Same as preceding, but with body white below level 
of eye, and fins dusky. 
* The identification of this species is not yet certain. 
