any idea what this is on the nerite snail shell?

[Jack_L]

okay, its a bit of a quiz because i think i NOW know what i'm seeing. but when I took this photo for this group i didn't. and the title was the title.

just for fun, when i remember to, i'll share what AI said: AI said its a halloween hermit crab

 

[MikeyZo]

Get a pokèball! It’s Omastar!

 

[Jack_L]

its an orange mushroom, not sure why it did that, i think a mysis shrimp landed on it. i thought it was a nerite i added and the shoom decided to move.