Bioluminescent secretions released from glands which produce light through the chemical interaction between an enzyme (luciferinase) and a substrate (luciferin).

[Ostracoda] Most halocyprids produce bioluminescence. Examples of the sites of bioluminescence in various halocyprids:

Conchoecia subarcuata9
Conchoecia magna9
Mikroconchoecia curta9
Disconchoecia elegans9
Paramollicia rhynchena9
Orthoconchoecia haddoni9
Conchoecilla daphnoides9
Conchoecissa imbricata9
Paraconchoecia spinifera9