Coprolite or fossil unbaked crescent roll?

[lulu 0]

I found this 3 cm long x 2 cm wide x 1-1/2 cm thick curved rock just last week on a southeast Florida beach near the town of Jupiter. 

Our beaches have a lot of fossil shells, bones and teeth. This nugget was different from my usuals finds- larger and softer looking than a shell fossil.

It has a smooth fine grained texture and the end looks “pulled”, not broken. 

Thoughts?

[daves64 751]

Looks to be a steinkern of a gastropod. 

 

[Vieira 618]

Its a gastropod mold.

[Mark Kmiecik 1,232]

+1 gastropod steinkern.

[abyssunder 5,574]

+2 for gastropod steinkern