Overall foot print (LxW) is the biggest factor. It really depends on how planted it is as RTS tend to establish a territory and will chase any fish away from what is "theirs". If you allow for lots of hiding places, etc. it might be doable. That being said, if you somehow end up with an overly aggressive shark, I would expect the SAEs to be one of the first targets as they inhabit the bottom portions more often and they have a similar body shape. Just keep an eye out if you end up doing the combo and make sure you have arrangements if things do not work out.