Fishing catches - The Official Terraria Wiki

↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 If fishing in the Ocean biome, only bodies of water with fewer than 1000 tiles will yield this fish. ↑ 2.0 2.1 Armored Cavefish and Specular Fish share portions of the Common, Uncommon, and Plentiful catch quality slots. As an approximation, Armored Cavefish can be considered Uncommon, and Specular Fish can be considered Plentiful in Snow biome or Common otherwise. ↑ 3.0 3.1 3.2 3.3 3.4 This also implies a body of water that has at least 1000 tiles. Fishing in a small box above the ocean's surface, for instance, will not yield this fish.