You had better to manage your bag before you go to catch

Strategies of how to catch the Sea Turtle - There are many different strategies for fishing pools and catching the sevensouls gold Sea Turtle mount. In general:

The Sea Turtle is very rare, but the catch is random. Realistically, expect to spend days trying to catch the turtle. You might catch it a lot sooner.

The item is bound to angler, but no confirmation dialogue will appear (this was removed from rare fish in patch 3.1). So you can safely auto-loot and quickly re-cast.

Always keep a few bag slots free: You cannot loot the turtle if you don't have the bag space to store it. So, you’d better to manage your bag before you go to catch it. You also can buy anther bigger bag from merchants by WoW currency.

Each pool contains a finite number of fish. Every 3-5 catches (when the pool disappears) you will need to move on and find a new pool to fish.

Avoid sharing pools with other anglers: The pool will just be emptied faster, and you will waste time re-mounting and casting into pools which are emptied before your bobber splashes.

In theory, the Sea Turtle can be caught with fishing skill 1. However, lower skill wastes a lot of time, because many catches will be junk items.