Description: This sponge consists of a stalked, ovoid body with a single terminal oscule. It is pale yellow in colour and looks like a juvenile specimen of a Polymastia.

Habitat: This is a deep water species only rarely encountered by divers. It has been found recently on flat limestone reefs at 40m off the west coast of Ireland.

Key Identification Features:

• Flask-shaped body with short narrow stalk and terminal oscule
• Spiculation

Distribution Map from NBN: Quasillina brevis at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Quasillina brevis at iNaturalist World Species Observations database.