Cardinal Strugglling

[BlueWorldAquatic]

Without picture it is VERY hard to diagnose your problem.

Soundls like a parasite, this would explain the mangled look. It is posibly scratching itself on the rock.

The fireshrimp is still a cleaner shrimp, it my be trying to help, but never seen smaller fish allow them to get too close.

May be too late, but if it is a parasite, you may be able to use a freshwater dip on it.

Ken - BWA