Hippo
I bought a tiny one that I named Sidney. He was quarter sized when I bought him. I kept him for a couple of years in my 26 gal flat back hex. He became too big for the tank (6 inches) I then sold him back to the fish store. He was always a good eater, was never ill, and was a joy to watch. He shared the tank with a percula clown and a cleaner shrimp.
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