Hermit crab shell hitchhiker?

[ebestawn.]

A hermit crab in my tank recently started staying in one spot and has a red bubble on its shell. I need help identifying this organism and finding out how to get my hermit crab back to normal. I have researched it and no results have came up. Let me know if you know what it is.

Thank you

(Sorry for any misspellings)

 

[Peace River]

Welcome to R2R and thank you for the post. Is it possible that it is cyano?

 

[KJ]

Welcome to R2R!!! hard to tell from the pic.

 

[rkpetersen]

In that pic it does look like some form of red leafy algae, although probably not cyano.
However if you can blow it off with a baster, it likely is cyano.

Here's something I found growing on a zoa frag one time.
Eventually grew into a sheet of tough thick red algae with a slimy texture.
Never did figure out exactly what species of algae it was.