Originally posted by NerdgamerDave:

I have THREE just outside my main farm that swim around in the inlet. Sticking close to the shore I can sail up past them and mine copper. But go into the blue water? A green one comes out at night and two normals.

I also have a leviathan that spawns just outside the inlet :)

I though leviathans did not respawn? One i saw has not respawned in over 100 days.