Monkfish \Monk"fish\, n. (Zool.)
(a) The angel fish ({Squatina}).
(b) The angler ({Lophius}), esp. the goosefishes {Lophius
Americanus} in America and {Lophius piscatorius} in
Europe, used for food. --[MW10]
[1913 Webster +PJC]
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]