We have two hujeta gars that we got not too long ago and they were in the same tank at the fish store when we got them and are in the same tank now and we haven't had any problems since they are peaceful fish but today when my boyfriend walked in the room he said one had the other in its mouth- not in an attacking/aggressive way but like holding the other one- is this normal or what does this mean? was it aggressive? they are supposed to be schooling and peaceful fish so iuno