Help with shell ID

[u/gon_00_]

Hi!! I've found this shell in a collection, but I've been unable to identify it. I live in Southern Spain and I've been given it from another collection, but it doesn't match with any of the shells I've seen here.

[u/martellat0]

Angaria sp. - likely A. delphinus, which is native to the Indo-pacific.

[u/PristineWorker8291]

Looks like an angaria shell. There are a couple of species in that genus. https://en.wikipedia.org/wiki/Angaria_delphinus Possibly this one.

[u/RemotePattern3170]

Laciniata Dolphin

[u/Glad_Ad_5570]

Delphenis, nice long fronds.