Image of Derbesia marina

Description:

It was only when the branching filamentous phase of the green alga Derbesia was cultured that it was determied to be the same species as these little 10 mm 'peas,' previously called 'Halicystis.' These, then, are the sexual phase in the alga's life cycle; they grow only on coralline red algae. Depth 25 m.