I have on now and it look really happy its not aggressive at all i have 4 blue/green chromis with it and do not even "look" at those. My bloodfire shrimp is always with it and cleaning is mouth. I can even pet him without problems. Never looked at the top of the tank, my LR
is set with cave and trench so a lot of hiding place is good. Mine love clams and table shrimp but dont like squid. Its a very strong fish mine is 2 1/2feet and move 20lbs rock when eating. Really nice fish i bought mine at my lfs
it was in a 25-30gallons since no one wanted him
i bought it and bring it home in my 80gallons and now have place to swim until i buy a bigger aquarium when i will move. If you have the place and the food lol go for it ! Mine live with my smaller snowflake and they go well along. Both of them love to be pet !!