Rather Recently, I got I Green Spotted Puffer fish from my local Wal-Mart store. I saw it and immediately thought that I could add it to my 5 gallon fresh-water tank. Boy did I make a huge mistake!!! I did some research after I got it and found out that it was NOT what I expected! I thought I was buying a small fish, a docile fish, a cute fish, and a fish that would do no harm and would swim around slowly around my tank. However, after some research I found out that I happened to purchase a fish that can grow up to 6 inches, has the aggressiveness compared to a piranha, eats literally anything in sight, and lives for over 10 years! So now I am stuck with a little killer who scares the most aggressive fish to death. And eats even inedible stuff.