''Syllis'' is a genus of marine
bioluminescent
Bioluminescence is the emission of light during a chemiluminescence reaction by living organisms. Bioluminescence occurs in multifarious organisms ranging from marine vertebrates and invertebrates, as well as in some fungi, microorganisms inc ...
polychaete worms.
References
{{Taxonbar, from=Q2373926
Polychaete genera
Bioluminescent annelids
Syllidae