Washed Ashore 

I have no ID but the color is great.

werde mich mal hier schlau machen, habe das naemlic gestern auch gesehen... nur ohne die, zugegeben schoenen "Schneckenhaeuser"

gorgeous!!!

Wow - what a find!

Spitze!

It sure is beautiful and a great shot too!

Thanks for sharing it in the Australian Fauna & Flora group.

Hey, this is called the violet snail, the Janthina. They spend their entire life on water and rarely touches the bottom or shore! They float and travel round the globe on the ocean currents. You've caught one of these delicate shells after it must have gotten washed up onto beaches during storms. If you had picked up the shell when the animal inside was alive, you would have got yourself dyed in a pretty purple colour, which the animal uses for protection against its enemies.
Good photo. Where did you get this one?

Thank you for the insightful comment Ramjee!
I took this picture at the Royal National Park, just south of Sydney, Australia.