Stylonema alsidii

Stylonema alsidii is a species of marine red algae. The type locality is Trieste in Italy, but it has a worldwide distribution.
Distribution.
It is one of the algae of the Houtman Abrolhos, found off the coast of Western Australia. It is one of the red seaweeds of South Africa, including the seaweeds of the Cape Peninsula and False Bay.
Ecology.
It is susceptible to infection by the parasitic oomycete "Pythium porphyrae".