Fishing is a resource-gathering activity that can be done at any body of liquid in Terraria. To fish, you will need a Fishing Pole and Bait. This wiki page
Hopping Into Hardmode - Terraria Guide - IGN
All Rainbow Conch Locations - Sea of Stars Guide - IGN
Terraria Frequently Asked Questions - Terraria Guide - IGN
Terraria: A Complete Guide To Fishing
Terraria Xbox 360 Collectors Edition VGA Graded 80+ (Not CGC, WATA
Things to Do In the World of Terraria - Terraria Guide - IGN
Fishing Guide - Palia Guide - IGN
Expert Mode - Terraria Guide - IGN
How to go fishing in Terraria - Dexerto
Terraria Guide - IGN