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Shells

Diverse & varied

Shells



Shells is used on this website to cover marine bivalves (e.g. clams, scallops) and gastropods (e.g. tritons, cones, cowries. Many species are vulnerable to excessive collecting either for food or for ornaments and shell collectors. As an example, in April 2021, 200 tons of illegally collected giant clams were seized in what was the third in 2021.

Other reef dwellers have shells - sea hares, headshield slugs, chitons, and cuttlefish. These are dealt with on other pages

Help support the organisations protecting the reefs, developing sustainable fisheries and monitoring international trade.

Only the Ovulid Cowries are shown for the moment. More are coming!

Invisible World



Ovulid cowries are the camouflage masters of the snail world! They live their entire lives on soft corals, gorgonians or black corals. Sometimes they are restricted to a single host species. "The Invisibility Cloak" by Rogan Draper and Sue Churchill (reviewed on the Review page is an excellent, easily read account of the group.

Spindle-shaped Ovulids

Aclyvolva lamyi
Hiatovolva rugosa
Stacks Image 1842
Naviculavolva deflexa
Naviculavolva deflexa
Pellasimnia iprocera
Phenacovolva nectarea
Phenalcovolva parvita
Phenacolvolva rosea
Phenacolvolva rosea - with eggs
Phenacolvolva rosea
Phenacolvolva rosea - with eggs

Globular Ovulids

Diminovula culmen
Dentiovula eizoi
Diminovula sp.
Diminovula stigma
Habuprionovolva aenigma
Habuprionovolva basilia
Habuprionovolva basilia

Hump-backed Ovulids

Archivolva clava
Crenavolva sp.
Crenavolva sp.
Crenavolva sp.
Crenavolva aureola
06-Cuspivolva formosa
Cuspivolva formosa
Cuspivolva tigris
Cuspivolva tigris
Dentovula mariae with eggs
Dentovula dorsuosa with eggs
Prosimnia pirei
Primovula rosewateri
Primovula rosewateri
Primovula rosewateri
Primovula rosewateri
Primovula cf. rosewateri
Rotaovula septemmacula

Cowrie-shaped Ovulids

Calpurnus verrucosus
Ovula ovum
Procalpurnus semistriatus - juvenile
Stacks Image 2715

Help Save Reefs!



The organisations that work to protect coral reefs and our oceans need as much support as they can get. Check out:

If you are a diver, and especially if you are an underwater photographer, donate. If you do nothing, there will be nothing to dive on and nothing to photograph.

These are suggestions, but not endorsements of the suggested organisations. It is your responsibility to review and check the charities you wish to donate to.

Spindle-shaped Ovulids

Invisible World

Ovulid cowries are the camouflage masters of the snail world! They live their entire lives on soft corals, gorgonians or black corals. Sometimes they are restricted to a single host species. "The Invisibility Cloak" by Rogan Draper and Sue Churchill (reviewed on the Review page is an excellent, easily read account of the group.

Spindle-shaped Ovulids

Aclyvolva lamyi
Hiatovolva rugosa
Hiatovolva coarctata
Naviculavolva deflexa
Naviculavolva deflexa
Pellasimnia iprocera
Phenacovolva nectarea
Phenalcovolva parvita
Phenacolvolva rosea
Phenacolvolva rosea - with eggs
Phenacolvolva rosea - with eggs

Globular Ovulids

Invisible World

Ovulid cowries are the camouflage masters of the snail world! They live their entire lives on soft corals, gorgonians or black corals. Sometimes they are restricted to a single host species. "The Invisibility Cloak" by Rogan Draper and Sue Churchill (reviewed on the Review page is an excellent, easily read account of the group.

Globular Ovulids

Diminovula culmen
Dentiovula eizoi
Diminovula sp.
Diminovula stigma
Habuprionovolva aenigma
Habuprionovolva basilia
Habuprionovolva basilia

Hump-backed Ovulids

Invisible World

Ovulid cowries are the camouflage masters of the snail world! They live their entire lives on soft corals, gorgonians or black corals. Sometimes they are restricted to a single host species. "The Invisibility Cloak" by Rogan Draper and Sue Churchill (reviewed on the Review page is an excellent, easily read account of the group.

Hump-backed Ovulids

Archivolva clava
Crenavolva sp.
Crenavolva sp.
Crenavolva sp.
Crenavolva aureola
Cuspivolva formosa
Cuspivolva tigris
Stacks Image 3060
Dentovula dorsuosa with eggs
Prosimnia pirei
Primovula rosewateri
Primovula rosewateri
Primovula rosewateri
Stacks Image 3066
Rotaovula septemmacula

Cowrie-like Ovulids

Invisible World

Ovulid cowries are the camouflage masters of the snail world! They live their entire lives on soft corals, gorgonians or black corals. Sometimes they are restricted to a single host species. "The Invisibility Cloak" by Rogan Draper and Sue Churchill (reviewed on the Review page is an excellent, easily read account of the group.

Cowrie-like Ovulids

Calpurnus verrucosus
Ovula ovum
Procalpurnus semistriatus - juvenile
Procalpurnus semistriatus - adult