Clam on snail’s shell ??

[Alexoss]

This snail came with some kind of clam on its shell, any idea what it may become?

 

[KrisReef]

Looks like a Zigzag clam?

 

[G Santana]

Cool little bivalve hitchhiker!!!

 

[vetteguy53081]

it is a clam. The ridges on shell indicate it whereas by valve more of a scallop shell.

 

[Alexoss]

i wonder how it will turn once the clam get too big to remain on the shell, will it detach to settle elsewhere ?

 

[Alvaro_Spain]

i wonder how it will turn once the clam get too big to remain on the shell, will it detach to settle elsewhere ?

Sadly no, it will continue growing till the snail eventually dies of natural cause or isn´t able to move anymore due to the effort of carrying the clam. Probably first. Snails don´t live that long.