Found on the beach in Mablethorpe

Found on the beach in Mablethorpe

Observation - Found on the beach in Mablethorpe - UK and Ireland. Description: I found this shell thing this week washed up on the beach. Am intrigued to find out what it came from. It is a hollow shell, I have shown 2 pictures one from the top and one from the underneath

I found this shell thing this week washed up on the beach. Am intrigued to find out what it came from.
It is a hollow shell, I have shown 2 pictures one from the top and one from the underneath