Wow. Didn't realise this, but the Mandarin Dragonet changes color during the night time for camouflage.
At first I thought he'd died, but apparently it's what they do.
Alternatively, it could be his Halloween costume...
Yup. Lots of fish change color at night. I had a yellow tang who was almost white after dark. I think my old mandarin was the most dramatic change though.
Wow, I never would have known that the change was that drastic. Is your mandarin eating frozen Martin?
I don't think he's eating frozen. He seems to watch it float past, but not much else. He's in an established tank with lots of rock, so hopefully enough pods there.