specimens examined by Randall (1967) contained no plant material, 

 but Beebee and Tee-Van found algae with crustaceans and organic 

 matter in specimens from Haiti. 



Holocanthus ciliaris (Linnaeus) . Queen Angelfish 



Adult queen angelfishes were occasionally seen on the main reef, 

 most often during the early morning hours, but presumably the 

 species is active throughout the day. Twenty-six specimens examined 

 by Randall (1967) contained mostly sponge material, but included two 

 species of Dictyota , constituting 1.4% of the stomach contents. 



Holocanthus tricolor (Bloch) . Rock Beauty 



Rock beauties were occasionally seen on the main reef, and several 

 were associated with coral heads on the algal plain in depths to 



23 m, as much as 35 m from the main reef. Randall (1961) examined 



24 specimens with stomach contents including mostly sponge material, 

 but with 0.8% algae of three species. Beebee and Tee-Van (1928) 

 indicate that food for this species is "algae and scrapings." 



Pomacanthus arcuatus (Linnaeus) . Gray Angelfish 



Gray angelfishes were encountered every day throughout the mission, 

 sometimes singly, but more often in groups of two to six. Because 

 these fishes are unafraid of divers (often approaching to mouth 

 bubbles from a scuba tank) , numerous observations were made. They 

 were among the first fishes up and active in the morning, and often 

 appearing along the face of the main reef as night shaded to dawn, 

 between 0530 and 0545 hours. Individuals were seen grazing on the 

 algal plain as late as 1830 hours, but only once was one found at 

 night, "resting" but exposed against a large coral head. 



Once when filamentous and encrusting algae were being scraped from 

 one of the plexiglass shark retreats in 18 m depth, six gray 

 angelfishes approached and began eating the fragments that floated 

 free in the water. They were often seen grazing on the algal plain, 

 most frequently within 35 m of the reef, but three were observed 

 65 m distant on July 17 eating Udotea and Halimeda . 



During feeding trials, P^. arcuatus nibbled most species that were 

 brought from the algal plain: the green algae Halimeda , Avrainvillea , 

 Udotea , and Caulerpa , the red algae Acanthophora , Galaxura , Gracilaria , 

 Hypoglossum , the brown algae Lobophora and Dictyota , and the sea grass, 

 Syringodium . But a decided preference was shown for the large green 



VI-152 



