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Cavoliniidae: Cavolinia tridentata (Forsskål in Niebuhr, 1775) (‘three-toothed sea-butterfly’)
Synonym(s): tridentata Forskal, 1950.
Typical shell-length 20 mm. Lives in offshore waters in midwater. Native. Occurs in eastern and western Australia (QLD, NSW, TAS and WA); also widespread in cool temperate zones of both hemispheres.
Classification
Class: Gastropoda
Subclass: Heterobranchia
Order: Thecosomata
Superfamily: Cavolinioidea
Family: Cavoliniidae
Genus: Cavolinia
Localities for Cavolinia tridentata
![species image](https://molluscsoftasmania.org.au/wp-content/uploads/2018/04/Cavolinia-tridentata_a.jpg)
![species image](https://molluscsoftasmania.org.au/wp-content/uploads/2018/04/Cavolinia-tridentata_b.jpg)
![locality map](https://molluscsoftasmania.org.au/wp-content/uploads/2018/04/Cavolinia-tridentata.jpg)
![species image](https://molluscsoftasmania.org.au/wp-content/uploads/2018/04/Cavolinia-tridentata_c.jpg)