It is a .....what?

[RWS6605]

Found these on a rock today. They look like a half shell. I thought I saw it moving but not sure. Also found a couple riding on a few of my hermits. Thoughts?

 

[Crabs McJones]

Limpet of some type perhaps?

 

[RWS6605]

Limpet of some type perhaps?

Is that a good sign?

 

[Crabs McJones]

Is that a good sign?

Limpets are good things

 

[mta_morrow]

Limpet. I just bought some for my tank

They don’t do a whole lot, but it’s cool to see them.