any help? rod's onyx gaping mouth

[reefsafe]

had these clowns for 8 months. Moved them into a different tank one week ago. Everything fine. Checked on them this morning, everything fine. About an hour ago, male clown has gaping mouth and won't eat. Same water in this tank as in other tank. Other clown is fine. Doing a water change. any suggestions? Thanks.

 

[Idlemind]

Hows the water flow? You could try increasing the oxygen by using with an air pump & stone.

 

[OrionN]

If the other clown "is fine" then it is not the water. Change water won't help. Sometime clown take a bite on a Bristle worm and get a mouthful of bristles. It take a few day for the bristles to dissolve and the clown would be fine again. Look and see if this is the case.