reefnut or someone else who know hitchhikers

[sweetdawn]

i posted this before and didnt get an answer can you please tell me what is on my clam the one in the back I have seen looks like it pulls a little trapdoor shut

 

[pondy]

Does this little critter have antenaes that swirl around in circles? Just asking cause I bought a rock with some little crabs with huge left claws that only eat plankton, they kinda look like they have a trap door. can you get a different angle, the little guys in my aquarium are way interesting

 

[viper_930]

Look up vermetid snails.

 

[sweetdawn]

those are small spiral like tubes this is much bigger like the size of a dime around

 

[ricks280]

its a trapdoorbug! :hilarious

(sorry i just had 2)
rick.

 

[salty cheese]

Vermetid snail.