Clown fish laying on her side bottom of tank

[yellowhshine]

I have a 40 gallon season tank. All of sudden older female Clown fish seems to have buoyancy issues? Like shes' struggling to stay off the bottom? She'll move around when she sees me, but she's been on her side laying down most of the day. Almost as if she gets tired after moving for a few minutes? No signs on her body, no marks, there's one one smaller clown in the tank with her. Any thought?

 

[tharbin]

Welcome to R2R! As others have said, post a white light video and give a few more details like eating so that the fish medics on here can have a better idea of what may be wrong with your Clownfish.