• Ram’s horn shell
Scientific classification
Kingdom:Animalia
Phylum:Mollusca
Class:Cephalopoda
Subclass:Coleoidea
Superorder:Decapodiformes
Order:Spirulida
Family:Spirulidae
Genus:Spirula
Species:S. spirula
Bodufinolhu Isl., Maldives
From my collection
via Flickr https://flic.kr/p/2iT5ppe