Giant Frogfish

Antennarius commerson

Giant Frogfish (Antennarius commerson) is a cryptic ambush predator of tropical reefs and rubble, famous for its lure-like illicium and extreme color change. It lies motionless until prey comes close, then strikes with a lightning-fast gulp.

Saltwater

Giant Frogfish reference image — Diego Delso, cc-by-sa, via Wikimedia Commons. Source: Wikimedia Commons.

Identification points

Large, squat, globular body with a warty or spiny skin texture
A long anglerfish 'fishing rod' lure on the head with a fleshy bait tip
Huge upward-facing mouth and highly variable mottled coloration that mimics sponges or rock

Habitat

Tropical and subtropical coral reefs, reef slopes, lagoons, rubble, and sponge-covered bottoms, usually resting on or near the substrate at shallow to moderate depths.

Bait notes

Rarely targeted as a game fish; if caught incidentally, small live shrimp, sardines, or tiny baitfish are more relevant than standard lures. Soft plastics worked very slowly near the bottom may entice a strike, but sightings are usually better than fishing for them.

Behavior

A sedentary sit-and-wait predator that mimics sponges or algae and uses a modified dorsal fin spine as a lure. It feeds on small fishes and crustaceans, often taking prey nearly its own size.

Caution

Has a very large mouth with a powerful bite and can inhale prey suddenly; handle only with great care and never put fingers near the mouth. In many regions it is a poorly known ornamental reef fish, so local collection or possession rules may apply.

Fishing notes

Best encountered by reef divers or snorkelers rather than anglers. If trying to photograph or observe one, move slowly and avoid touching coral or the fish; anglers should release immediately and minimize air exposure if hooked.