Table 1.

Bioluminescence classification, from Martini and Haddock¹⁸.

Bioluminescent	Organisms described as bioluminescent in the literature or direct observations.
Likely	Organisms probably bioluminescent based on taxonomic assignment.
Non-bioluminescent	Organisms described as non-bioluminescent in the literature.
Unlikely	Organisms probably non-bioluminescent based on taxonomy assignment and direct observations.
Undefined	(1) Organisms that could not be categorized because they were equally likely to be bioluminescent or not, as well (2) organisms whose bioluminescent capability has not been examined or reported.