Rosewater's Primovula

Primovula rosewateri

Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
Order: Littorinimorpha
Family: Ovulidae
Genus: Primovula
Species: Primovula rosewateri

Rosewater's primovula (Primovula rosewateri) is a tiny ovulid that lives on gorgonians and soft corals, matching its host's colours. It is named after malacologist Joseph Rosewater.

Its shell is only about 1 cm long. Its mantle, with small papillae, mimics the polyps of its host, which it feeds on.

In the Philippines it is found on gorgonians and soft corals on reef slopes.

Photo: Kai Squires, CC BY 4.0, via iNaturalist