Odd mix – Sponge and algae – same shape, diff…

Odd mix - Sponge and algae - same shape, different ancestry #marineexplorer #underwatersydney

Odd mix – Sponge and algae – same shape, different ancestry #marineexplorer #underwatersydney by John Turnbull

Via Flickr:

An odd relationship, with the algae (codium?) growing on the sponge, both with similar morphology. Plants split from animals in the evolutionary tree around 1.5 Billion years ago. Convergent evolution? Bare Island