When you hook a big fish, reel it in slowly, or the fish will get away. Only reel it in one or two clicks at a time. Click again when the fish is not being pulled up, and is swimming forward or down. Keep doing this at a steady pace, and you will soon catch the fish.
A small tip: If you only want big fish and you hook either a normal or a small one, just click "Go Fishing!" again and you will not lose a worm to get a fish you don't want. I tried this and it didn't work for me... personally, I'm not sure how to catch one at all.
On Prison Isle
No you cannot.
Yellow fish is - Adolphus, Green fish is - Gustavus, and Purple fish is - Mercurius
Adolphus
Green Fish - Emerald. SweetDream, Brown server. :)
isle 2
It is pretty simple; they catch fish.
sometimes it depends on what fish you are trying to catch
Adolphus, Gustavus, and Mercurius.
Beavers don't catch fish
Any items you pick up or make, as well as horses you catch.
you can catch sun fish with a fishing pole