Chaetodon ocellatus

Chaetodon ocellatus
Spotfin Butterflyfish – Chaetodon ocellatus Photo Credit: NOAA Fisheries, Pascagoula Lab
FamilyScientific NameAuthorYearCommon Name
ChaetodontidaeChaetodon ocellatusBloch1787Spotfin Butterflyfish

Chaetodon ocellatus

Unique Characters: Snout shorter, more than 2.4 in head length. Eyeband blackish, not extending forward and ending on upper portion of snout. Body variously provided with bars or spots. Eyeband extending from nape or shortly before dorsal-fin spines to eye as strong dark bands, continuing as dark bands below eye downward and backward. Interorbital stripe absent. Body without black lines converging at midline to form anteriorly directed angles. Soft dorsal and anal fins with acute angle, extending backward to provide almost continuous line with posterior edge of caudal fin. Black spot present on base of soft dorsal-fin rays (can fade). Small black spot at angle of soft rays. Dorsal fin with 7 or 8 spines and 18-20 soft rays.

Similar Species:

Foureye Butterflyfish Chaetodon capistratus

Banded Butterflyfish Chaetodon striatus

Reef Butterflyfish Chaetodon sedentarius

Chaetodon capistratus
Foureye Butterflyfish – Chaetodon capistratus
Chaetodon striatus
Banded Butterflyfish – Chaetodon striatus Photo Credit: NOAA Fisheries
Chaetodon sedentarius
Reef Butterflyfish – Chaetodon sedentarius Photo Credit: NOAA Fisheries, Pascagoula Lab

Foureye Butterflyfish Chaetodon capistratus. Snout shorter, more than 2.4 in head length. Eyeband blackish, not extending forward and ending on upper portion of snout. Body variously provided with bars or spots. Eyeband extending from nape or shortly before dorsal-fin spines to eye as strong dark bands, continuing as dark bands below eye downward and backward. Interorbital stripe absent. Body with black lines converging at midline forming anteriorly directed angles. Dorsal spines normally 8. A large black ocellated spot present on posterior body below second half of soft dorsal-fin rays.

Banded Butterflyfish Chaetodon striatus. Snout shorter, more than 2.4 in head length. Eyeband blackish, not extending forward and ending on upper portion of snout. Body variously provided with bars or spots. Eyeband extending from nape or shortly before dorsal-fin spines to eye as strong dark bands, continuing as dark bands below eye downward and backward. Interorbital stripe absent. Body with black lines converging at midline forming anteriorly directed angles. Dorsal spines normally 7. No ocellated spot on posterior body, but body crossed by 2 broad dark bars, first from anterior dorsal-fin spines to abdomen, second from last dorsal-fin spines to middle of anal fin.

Reef Butterflyfish Chaetodon sedentarius. Snout shorter, more than 2.4 in head length. Eyeband blackish, not extending forward and ending on upper portion of snout. Body variously provided with bars or spots. Eyeband extending from nape or shortly before dorsal-fin spines to eye as strong dark bands, continuing as dark bands below eye downward and backward. Interorbital stripe absent. Body without black lines converging at midline to form anteriorly directed angles. Soft dorsal and anal fins short, rounded, not extending past caudal-fin base. Dark band extending across posterior fins and body, more persistent and stronger on caudal peduncle and into anal fin.

Gallery