The Killer Clownfish Why your clownfish aren't getting along. Well, here's a surprising fact: Clownfish prefer to live in harems. If you only have two, they'll pick on each other until, sadly, the smaller one gives up the ghost. So, if you're considering clownfish, it's best to start with a group of four or five. Remember, avoiding the common mistake of keeping just two can save you a lot of heartache. Share this video if you found these clownfish facts helpful! #MarineAquarists #ClownfishCare #