What is this?

[DavL]

My tank has been up for almost 2 years. I just found recently that there are some oral shape creatures showing up near the surface of the sand bed in the evenings (see attached image). Can someone advise me what it is?

Thanks

 

[Fungusamongus]

Maybe a Chiton? Take a look at these from this site. Are they similar?

https://www.kandpaquaculture.com/product-page/mesh-pitted-chiton-ischnochiton-pappillosus

 

[Coral Memere]

It looks like chitons. Algae eating mollusks. Good things.

 

[Gumbies R Us]

I'll agree with everyone that it looks like a chiton

 

[DavL]

Thank you everyone. Nice to know it is a good thing for the tank