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Pleurobranchidae – Pleurobranchinae: Berthella medietas Burn, 1962 (‘mid-point sea-slug’)
Synonym(s): medietas Burn, 1962.
Typical body-length 35 mm. Lives intertidally to offshore amongst sponges. Native. Occurs in southeastern and southwestern Australia (NSW, TAS, VIC, SA and WA); also New Zealand.
Classification
Class: Gastropoda
Subclass: Heterobranchia
Order: Pleurobranchomorpha
Superfamily: Pleurobranchoidea
Family: Pleurobranchidae
Genus: Berthellina
Localities for Berthella medietas
![species image](https://molluscsoftasmania.org.au/wp-content/uploads/2018/04/Berthella-medietas_c.jpg)
![species image](https://molluscsoftasmania.org.au/wp-content/uploads/2018/04/Berthella-medietas_a.jpg)
![locality map](https://molluscsoftasmania.org.au/wp-content/uploads/2018/04/Berthella-medietas.jpg)
![species image](https://molluscsoftasmania.org.au/wp-content/uploads/2018/04/Berthella-medietas_b.jpg)