| Krill and deep pelagic fish such as Lanternfish and Anglemouth have light-producing organs called photophores. |
| Similar photophores can be used all over the body for signalling in schooling and reproduction. |
| The light-producing organs, or photophores, of many deepwater fishes provide a unique form of countershading. |
| Deep sea fish have organs called photophores which create a center for the bioluminescent reactions. |
| Rhadinesthes decimus also has a barbel that extends about half the length of the head and has photophores and luminous material near the stem. |
| Jellies are everywhere in sizes and shapes that defy description, their bodies radiant ripples of photophores. |
