Ruby dragonet not doing so hot

[SirCastic]

I got my Ruby Dragonet on saturday, drip acclimated him and let him into the tanks. i saw him eat some mysis shrimp and have slowly been trying to move him to a mix of mysis and pellets, but yesterday he didn't come out of hiding. I managed to net him to take a few pics, it looks like one side of him is kinda mangled and i have no idea how or why! any help would be appreciated.
I need to leave my house, so i could only snap one quick pic i'll try to get more when i come back.
Nitrites 10-20
Nitrates- 0
Ammonia- 0

 

[Lsufiregal]

What else is in the tank? Any big crabs? Any other bottom dwellers? How old is the tank?

 

[SirCastic]

I have a neon dotty back, pajama cardinals, an emerald crab and a few helmets and nassarius. The tanks is about 2 months after cycling, and it's 55 gallons

 

[Lsufiregal]

Oh my. A dragonet in a 2 month old tank is worrisome, but you said he was eating. I bet your dottyback is the culprit. How is he today?

 

[Newsmyrna80]

^agree...the tank is extremely immature. Copepods take quite a few months to reach acceptable levels for this fish.

 

[Aquat]

Possible starvation. Even if he's in the process of being trained to eat prepared food, he's still gonna be on the prowl for pods. A single dragonet can consume hundreds of pods a day.

 

[Nina51]

are you sure you don't have your nitrates/nitrites reversed?

dottybacks can be extremely aggressive and my money is on that fish.

 

[snorvich]

dottybacks can be extremely aggressive and my money is on that fish.

Mine as well.