I recently inherited 2 fish from my boss - a large clarki and a large blue velvet damsel. Both are approx 7 year old. The clarki has settled in well and loves his new 90 gallon home, but something must have happened in the capture or transefer of the damsel. He seems unable to swim properly. He balances on his tail in the corner of the tank and spins. He does not seem to be able or want to swim across the tank.
So my delimma - do I let him continue to " live" like this ? The clarki appears to bring him food and "protects" him from the other fish as he would an anemone.
Is this possible a learned behavior - a misplaced hosting instinct by the clarki ?
Do I euthanize him ? And if so - how? Freezing method or clove oil and vodka method?