what is this im a little rusty on my identifications

[magnoliarichj]

thank you

 

[taricha]

chiton maybe? although every example of chiton seems to have segments to the shell.
crazy color variations possible.
crazy chiton color variations

 

[FishInABarrel]

Looks like a chiton.

 

[Betta132]

I'd say chiton. It's basically a really weird snail. Harmless algae-eater.