Trochus Snail Inquiry.

[Jasonanatal]

Hello everyone, I recently purchased two Trochus Snails for my JBJ 29 gallon Nano Cube HQI Quaratine Aquarium. But I noticed something on them that I have not seen or neglected to notice on any other snail I have own. Have anyone seen this before. I'm assuming its a normal extenion from their bodies to react to stimuli from the surrounding environment.

Photograph - Trochus Snail.

 

[Treef]

Its normal, mine has them too. They are awesome cleaner I see mine on the glass, rocks, and sand.