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Mycteroperca interstitialis - Yellowmouth grouper

Mycteroperca interstitialis - Yellowmouth grouper Photo courtesy: Geoff Schultz

The yellowmouth grouper is brownish with varying dots and splotches. Their large mouths have yellow at their margins and their pectoral fins are pale at the base and edge. Juveniles have black backs and white bellies with yellow tints on their front dorsal fin spines. Yellowmouth groupers feed on fish and crustaceans and range in size from 1 to 2 feet in length. They are usually found among gorgonians and recesses of coral reefs at depths between 10 and 80 feet.

Distribution, Stock Structure and Migration
Western Atlantic: Gulf of Mexico, Bermuda, Caribbean (mainly insular localities), and Brazil.

Found mainly on rocky or coral bottoms from the shoreline to at least 55 m depth; small and middle-sized individuals commonly occur in mangrove-lined lagoons. More common in island waters than along the coast.

Feeds on fishes.

Quick Fact
The yellowmouth grouper creates a powerful suction when opening its large mouth. This draws in prey items whole that are then trapped by numerous teeth that cover the grouper's jaws.

Learn More
- FishBase

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