From WordNet (r) 2.0 (August 2003) [wn]:
frogfish
n : fish having a frog-like mouth with a lure on the snout
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Frogfish \Frog"fish`\, n. (Zool.)
(a) See Angler, n., 2.
(b) An oceanic fish of the genus Antennarius or
Pterophrynoides; -- called also mousefish and toadfish.
[1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Angler \An"gler\, n.
1. One who angles.
[1913 Webster]
2. (Zool.) A fish (Lophius piscatorius), of Europe and
America, having a large, broad, and depressed head, with
the mouth very large. Peculiar appendages on the head are
said to be used to entice fishes within reach. Called also
fishing frog, frogfish, toadfish, goosefish,
allmouth, monkfish, etc.
[1913 Webster]