RollyPolly of the Sea?

[rebeccakelly]

Anyone know what these hitchhikers are? One looks like a rolly-polly arthropod and the other a clear something—both came on a coral.

Video link below:
https://www.icloud.com/sharedalbum/#B0qGrq0zwGIRija

 

[Dipi]

Hello! My guess would be stomatella snails for both, but it is hard to confirm with that video. Check some images of stomatellas on the internet and see if they match what you got.