Terraria – How to find the Angler

There aren't really any more specific tips on how to find him because he spawns randomly.

After you've beaten the Goblin Army (after patch 1.1), he has a chance of spawning near you if you're underground (between the rock layer and the Underworld). Just revisit the Dungeon or go cave diving for a bit and you should find him sooner or later.

Also, you should chug a Hunter Potion to increase your odds of finding him if he does spawn. It makes him glow in a green light, just like enemies.

Pretty much all of the biomes (using Terraria's liberal definition of "biome") can be moved to another location, within certain limits.

The most extreme example is a Meteor crash site biome, which can exist anywhere, at any height. At the other end of the spectrum, we have the Dungeon, which cannot be moved at all.

Completely immovable

• The Dungeon, because it requires an unsafe background wall below the Dirt Wall depth (cannot be placed by the player).
• The Underworld, which is restricted to the very bottom of the map
• The Sky, which, like the Underworld, is just there at a certain altitude.

Mostly immovable

• The Ocean is not completely immovable, but very inflexible. It is both restricted to a certain height (above the surface level), and can only exist within 250 blocks from either edge of the map. You can create an artificial Ocean in the middle of the map, but that won't spawn Sharks, nor will it grow Corals. Creating artificial Oceans that sort of float above the real one does work; I have actually done so to farm Corals.