ice-fish • v. [intr.] fish through holes in the ice on a lake or river.• n. (icefish) (pl. same or -fishes) 1. another term for capelin. 2. a scaleless Antarctic fish (Chaenocephalus aceratus, family Chaenichthyidae) of pallid appearance with spiny gill covers and a snout shaped like a duck's bill.DERIVATIVES: ice fish·ing n. (in sense 1).