Please I.D

[Miyagi570]

Found this in my tank today and don't know what it is..

The top is flat.

 

[sellersmd]

Looks to be the 'trap door' from a turbo grazer snail.

 

[GerritM]

It is a Operculum. :wavehand:

 

[Miyagi570]

THANKS!!!!!! I just watched a video on YouTube
http://www.youtube.com/watch?v=bH3SUcXdbUM