Found in Cozumel

I took a picture of this in Cozumel last month, but am having trouble identifying it.

Your input would be most welcome.

Thanks!

Ellen

It's the egg case of the West Indian Chank (similar to a horse conch). Turbinella angulata

Jeff Slimmon caught one in the act of laying the egg case (used with permission):

Thanks Jim for the ID on the image.

And a big thanks to Jeff for letting you use his image. I'm going to have to research this critter and learn more about it.

It was the very first time I had a chance to see it while diving.

Hope we get to dive together again soon!

Ellen