Deep-sea shrimp have organs called photophores which emit this to help identify a mate

Below you can find the Deep-sea shrimp have organs called photophores which emit this to help identify a mate Jeopardy Words Answer. The answer to Deep-sea shrimp have organs called photophores which emit this to help identify a mate has 5 letters. This clue belongs to the You animal category and is part of Jeopardy Word Level 623. If you scroll near the bottom you will find other clues and answers part of level 623