Tiger Grouper Identification Guide

Key identification features

• Elongate, streamlined body in brownish-gray to olive, overlaid with distinct pale diagonal stripes or bars
• Stripe pattern is most vivid on the upper body and fades toward the belly
• Pointed pectoral and dorsal fins typical of the Mycteroperca group
• Tail fin with a straight to slightly concave rear margin
• No bright yellow fin margins, unlike some closely related species

Common look-alikes

• Yellowfin grouper: lacks tiger grouper's diagonal striping and instead shows blotchy rosette markings plus a bright yellow edge along the pectoral fin.
• Scamp: patterned with small, well-defined dark spots rather than tiger grouper's diagonal pale stripes.
• Gag grouper: covered in wavy, worm-like dark markings instead of the clean diagonal bars that give tiger grouper its name.

Where you'll see one

Tiger grouper is found on coral reefs and rocky bottom throughout the Caribbean and Western Atlantic, typically hovering near ledges, walls, and reef drop-offs at moderate depths, often solitary but sometimes gathering in loose groups during spawning aggregations on offshore reef promontories.