What are these weird critters?

[Abaddon]

Smaller than limpets?....I'm surprised you even saw them to begin with...but I must admit, I'm old and my vision ain't what it used to be, lol

You could probably fit 2 or 3 of them inside an average limpet. I happen to have a limpet stuck to the same wall & can definitely see the difference.

 

[Slaphppy7]

You could probably fit 2 or 3 of them inside an average limpet. I happen to have a limpet stuck to the same wall & can definitely see the difference.

Wow, that's tiny...agree with WB though, probably nothing to fret over...