Ctenophore on starfish

Raja Empat, Papua, Indonesia

Fuji F2 105 mm, 1/90 @ f/27

It's unknown whether these are parasites or commensals. Pretty though..

Thanks to Leslie Harris, Collection Manager of the LACM-Allan Hancock Foundation Polychaete Collection at theNatural History Museum of Los Angeles County for pointing out these are ctenophores (comb jellies), not flatworms, as I had thought.