This black grouper was photographed on Riley’s Hump, in the Dry Tortugas National Park. Riley’s Hump is a well-documented multi-species spawning aggregation sight, where many varieties of snappers, groupers and jacks reproduce. Grunts are one of the most important forage sources for these breeder groupers. Photo credit: Don DeMaria

This black grouper was photographed on Riley’s Hump, in the Dry Tortugas National Park. Riley’s Hump is a well-documented multi-species spawning aggregation sight, where many varieties of snappers, groupers and jacks reproduce. Grunts are one of the most important forage sources for these breeder groupers. Photo credit: Don DeMaria