- Kingdom: Animalia
- Phylum: Porifera
- Class: Demospongiae
- Order: Astrophorida
- Family: Geodiidae
- Scientific name: Geodia barretti
- Norwegian: kålrabisvamp
G. baretti is a large, globular sponge. It may grow to a diameter of 50 cm and a weight reaching 24 kg.Young sponges are closest to having a perfect spherical shape. The color is usually white and brown. A similar, but irregular shaped sponge is the G. macandrewii.
It is most frequent deeper than 30 metres. It is usually found on steep walls or on rocky substrate.
G. Barretti is known from the North-East Atlantic, as far north as the Artic.