What is this?

[KatieMac]

Excuse my crappy skills - this was a few frames of a vidio - but what is this?

 

[tursiops]

Looks like an egg casing, maybe from a conch. How big was it, where was it?

 

[Nomad-Diver]

This, perhaps ?
Sea pen - Wikipedia

 

[KatieMac]

Looks like an egg casing, maybe from a conch. How big was it, where was it?

8 inches or longer. Maybe a foot

 

[KatieMac]

This, perhaps ?
Sea pen - Wikipedia

I don't think so. There was nothing rooted in the sand.

 

[tursiops]

 

[RyanT]

It's an egg case.

 

[ColoDale]

Queen conch egg case from a photo I took in 2011.

Cozumel Conch

• ColoDale
• May 15, 2011
• conch cozumel

UW Cozumel photos May 2011 Conch

 

[northernone]

Seeing them frequently in cozumel in the past week. Is it an annual event?

Cameron

 

[RyanT]

@ColoDale, I think what you've got in your photo is a horse conch. In queen conchs, the aperture of the shell is wide at the anterior end, so much, that there really isn't a siphonal canal. In your photo (on the right hand side where the shell is leaving the frame of the photo), you'll notice that the aperture narrows in actually creating a bit of a canal. Very cool photo though, thanks for sharing!