Boltenia Savigny 1816

These solitary tunicates characteristically are borne on a slender stalk of about 3 cm and armed with spicules. Fertilization of these hermaphrodites is external. Depth 13 m.

Boltenia echinata, growing on the underside of a boulder and surrounded by sponge. Diameter approximately 2 cm. Found at minus tide level on Sares Head. (Photo by: Dave Cowles, October 2007)

This closeup of the individual above shows the siphons partly open.

Boltenia villosa from subtidal near Rosario. Marks in background are mm, with cm noted. (Photo by: Dave Cowles, July 2006)