so i was just sitting and watching movies on my laptop and when i turn around i saw my flowerhorn doing so kind of free style swimming. i never see him done that before. i saw one of my flowerhorn did a some kind of somersault before but this one is like he swimming up side down. he swimming to one corner of the tank and then he dive down and swim upside down and he keep doing that for a few times then he swim like normal again. is he just playing or is something wrong with his swimming bladder?