Definition of sea toad:
(n) :
Any fish of family Chaunacidae (frogmouths, coffinfishes).
(n) :
Any marine animal of toad-like appearance, such as sculpins (Cottidae spp.), toadfish, anglerfish (Lophiiformes spp.), frogfish (Antennarius spp.), Antarctic ascidian (Cnemidocarpa verrucosa), Australian spider crabs (Gonatorhynchus tumidus), and pufferfish.