This observation is for the fish. The cormorant is https://www.inaturalist.org/observations/122397834.
Spot on the gill cover tells me this is a brown, but the color seems unusual.
(EN) Redspotted sandperch - (FR) Perche à taches rouges
Parapercis schauinslandii subadult, Tahiti, French Polynesia
Snorkeling
First record for this species on inat!