Does anyone know what this is?

[IMCochrane]

Unfortunately I'm losing the high resolution when I upload it

[Werbo]

Hopefully others will chime in.

Look more and more like flatworms from that 2nd pic.

[The Grizz]

I can confirm for you that these little rust colored flake looking thing ARE in fact a flatworm, if this is your tank you need to treat ASAP with flatworm exit. If you don't get on it now you will have thousands of them in a very short time & yes I am speaking from experience as I am dealing with them myself. I'm at the point where I will be moving all my coral and livestock to a new tank, after a through cleaning. New rock, sand and the works.

[IMCochrane]

Really eh? Bummer, I'm going to get on it rite away then

[Werbo]

I had these a few years back. Before treating with flatworm exit, siphon them out using a 1/4 inch airline tube. Get as many flatworms out by siphon because when they die they will release a toxin that can be fatal to your fish. Good luck!

[toytech]

Sorry to say but everyone is right , I had the same flatworms in my nano and when I did a tank transfer they all died and killed my clean up crew and a bunch of my corals . If you have enough space in your tank for another fish I would get a yellow corris wrasse .

[IMCochrane]

Does it specifically have to be a yellow? I was just looking on jl's website and they only list a red.

[Aysha]

Blue Velvet Nudibranch's also eat flatworms.