That Coris gaimard is going to devastate your crabs, snails and any other micro fauna and outgrow your 90 .
You menu selection is very good
Best fishes
And two thumbs up to your water changes
What grade CC did you use?
The pic is a combination of sea floor special and #1 CC
Those that know, we just pulled 400lbs out of a 200 gal tank.
It was amazingly clean and aerobic with no signs of anaerobic activity with no foul smell
If it eats...there is hope
And if it does eat...does it poop?
If it’s so emaciated I’ll guess internal parasites and probable goner
I do hope I’m wrong...
Good luck to the fish