Boring Bivalve or a failed head on elegance?

[EFlop]

Just read about these vile creatures today. Was wondering what everyones opinion was on this? I'm kinda leaning more towards failed head but this is a really tiny elegance (<3" across when open).

 

[vetteguy53081]

Either a new head or sponge

 

[kalel454]

Just read about these vile creatures today. Was wondering what everyones opinion was on this? I'm kinda leaning more towards failed head but this is a really tiny elegance (<3" across when open).

wow!