Leopard wrasse getting very thin

[Aquattro]

Originally Posted by ScubaSteve

I might be missing something here but there is an obvious factor here: the food. You said the previous owner fed pellets but you are feeding frozen. If it ate pellets but is spitting out frozen, feed pellets. It may actively pursue the food more.

That's the most sensible thing. My Leopard was a pig with pellets and eventually mysis, and aggressively competed with the rest of the tank for food.