Table 1. Bioluminescence classification.

Bioluminescent	Taxon described with bioluminescence capability in the literature.
Likely	Taxon probably bioluminescent based on taxonomic assignment and observations.
Non-bioluminescent	Taxon described as non-bioluminescent in the literature.
Unlikely	Taxon probably non-bioluminescent based on taxonomy and observations.
Undefined	Includes two cases: organisms that could not be assessed because they were equally likely to be bioluminescent or not, as well as organisms whose bioluminescent capability has not been examined or reported.