The hairy frogfish (Antennarius striatus) has a rounded body and its skin is covered with spinules resembling hairs. These spinules can be copious and long or very short and almost invisible. As with all frogfish, its expandable mouth allows it to swallow prey as large as itself. The color varies from yellow to brownish-orange, almost white, or even completely black with no visible pattern. The modified dorsal spine is used as a fishing rod and the tip of it has a three-pronged, worm-like esca (lure) which is used to attract prey. The worm-like lure is a way to easily distinguish the hairy frogfish from the similar-looking shaggy frogfish (Antennarius hispidus) with which it is sometimes confused, but which has an esca resembling a pom-pom.