Frogfish: Anglerfish ID, Lure, Venom and Aquarium Facts

Yes. Frogfish are a family of real marine fish, the Antennariidae, belonging to the anglerfish order Lophiiformes (Wikipedia). They look unreal because almost everything about them is disguise: a plump, high-backed, unstreamlined body with no scales, often covered in small forked spinules, in colours and textures that copy sponges, stones, coral and sea squirts.

One naming trap: Wikipedia notes that in Australia antennariids are called anglerfish, and "frogfish" there refers to an unrelated family, the toadfishes (Batrachoididae). If you read an Australian source, check which fish it means.

• Body: round and lumpy, scaleless, sitting still on the bottom rather than swimming (Wikipedia).
• Lure: a modified first dorsal spine, the illicium, forms a rod on the snout, tipped with a bait-like esca (Wikipedia; Underwater Photography Guide).
• Colour: juveniles are often white or yellow with reddish patches; adults range through pink, yellow, black, beige and green, and some grow scab-like or hair-like skin growths (Underwater Photography Guide). Many species can change colour (Wikipedia).
• Fins: arm-like pectoral fins used to walk.

Divers commonly see the giant frogfish (Antennarius commersoni), hairy or striated frogfish (Antennarius striatus), warty frogfish (Antennarius maculatus) and painted frogfish (Antennarius pictus) (Underwater Photography Guide). For a photo ID, get the lure on the snout and the whole outline; side lighting shows texture that flat flash hides.

A frogfish waits, disguised, and wiggles its lure until a fish comes close. Then it opens its mouth, which can expand up to 12-fold, and the prey is sucked in within about 6 milliseconds (Wikipedia). The Underwater Photography Guide calls it the fastest strike of any animal and notes frogfish are cannibalistic, which matters if you keep more than one.

Frogfish rarely swim in open water. Wikipedia describes two walking gaits using the pectoral and pelvic fins. For longer moves, especially young frogfish, they use jet propulsion: rhythmically gulping water and forcing it out through the small gill openings (Wikipedia; Underwater Photography Guide).

One species lives away from reefs entirely. Wikipedia describes the sargassum frogfish as living in drifting sargassum seaweed, and says it is occasionally carried as far north as Norway. It is also sold in the aquarium trade as the "sargassum fish" (LiveAquaria listed it from $79.99, out of stock, on 2026-09-25).

Wikipedia gives no information on frogfish venom, and the Underwater Photography Guide says the majority of frogfish, such as the hairy frogfish, are not poisonous. That is not a reason to handle them; divers should look without touching.

On eating, the Underwater Photography Guide says frogfish are not known to taste good and should not be eaten, and Wikipedia records no food use. We do not say any frogfish is safe to eat. If someone feels unwell after touching or eating an unfamiliar fish, contact a doctor or your local poison control centre.

Yes, and they are regularly sold. LiveAquaria sells them as "anglers" and says they reach an average of about 3 inches in captivity, adapt well and are relatively hardy. Prices on its frogfish page on 2026-09-25:

• Assorted angler: from $98.99
• Red/orange angler: from $136.99
• Assorted wartskin angler: from $198.99
• Black angler: from $129.99 (out of stock)
• Giant angler, 3 inch: $129.99 (out of stock)
• Sargassum fish: from $79.99 (out of stock)

LiveAquaria marks most of them as moderate care and reef-safe only with caution. The reason is the feeding method above: a mouth that expands up to 12 times will swallow any tankmate that fits, including another frogfish.

Frogfish live in tropical and subtropical waters of the Atlantic, Pacific and Indian oceans and the Red Sea, with the greatest diversity in the Indo-Pacific, especially around Indonesia (Wikipedia). The Underwater Photography Guide lists Lembeh Strait, Anilao and Dumaguete in the Philippines, Bali, Kona in Hawaii, Fiji, Mexico, southeast Florida, the Red Sea, Japan and tropical Australia. Ask a local guide: finding a frogfish usually depends on someone who knows which sponge it has been sitting on.

Research and drafting for this page were assisted by AI and checked line by line against the sources listed below. Every number names the organisation it comes from, and where sources disagree we say so instead of picking one silently. Prices and rules are given with the date we checked them; they change, so confirm before you rely on them. If you find an error, tell us and we will correct it.