well it is possible that it will grow out of that, but not for a while, sharks that you keep in home tanks arnt very interesting all they do is lay on the bottom, and you are spending a lot on a filter, UV sterilizer,skimmer and all the substrate, even tho the eppulaute(spelling?) is one of my favorite little sharks, i think you would be wasting your money, i to wanted a shark, i thought they were gonna be cool and i could feed them stuff and watch them go crazy, util i found out all they do is sleep and eat just like a cat, so i got triggers which would destory a shark, and they are a lot more interesting. now if you got a shark in that size tank you really couldnt put anything erlse in it except maybe a eel. but if you decidee not to go with the shark, the possibilities are endless, triggers puffers, eels etc..