it will be in a 85 gallon semi aqautic tank with one side of the tank all land aproximately a third of the tank size and their will be the dead mangrove roots and large rocks plus the live mangrove shoots popping out of the water for the inverts to hang on by the way i used to have a figure eight and he was with a blue crayfish and they were the same size but it was the oppisit and the puffer tried to bite the cray but its shell was to hard and the cray got mad and grabbed and snapped up the pufferJeox;2631631; said:I agree with the 6 inch MAX.
If this was for the tank you were planning, it WILL eat all of the inverts.