Acornfish

Oops! A squirrel dropped some enchanted acorns into the ocean... Now they have formed a (tasty) invasive species! Turn them in to Fort Squirrel for a sizable cash reward (50G/lb.) They can be found swimming at any depth, getting larger the farther down you go. The biggest ever recorded weighed a whopping 7429 pounds! (The runner-up is about 4000 lbs.)