is the apollo a type that can't mixed among other sharks, unless provied enough space?
Apollos are fine with other sharks. They stay at the top and generally mind their own business. Other sharks just ignore them unless the other shark pics on everything.
that'd be my shark then he's circles everywhere the top-middle, he don't like anymore sharks
Yeah, my point is that they won't get picked on for being a shark (they don't look anything like a shark in reality), they will only get picked on because the other shark doesn't like other fish. If your shark leaves anything non-shark alone, then an apollo should have no problems.
makes sense, my shark is 18" and can be a mean shark, he has no problem with my Clown Knife thats 18" and my Oscar that's 12"