Almost all marine fish have teeth. Usually they won't attack. Clowns are particularly bad about it. And, yes, maroon clowns are notorious, and frequently do damage to other creatures. Pretty---but!
If you have any worry, wear a latex glove---but be sure to wash the powder out of it, if any, because the powder designed to make it easy to get on will harm your fish and corals, and it will get wet inside, being short.
It's too thick for most things to get through---except the jabbers. Once you get one clean, just hang it upside down to dry in the sun, and you can get it on. It will prevent most bites and coral stings, which, by me, are nastier than the bites, and some people get allergic to the very water, because of too many stings. Just don't tangle with a moray eel or a maroon clown and you'll have nothing to worry about.