Photophores of deep-sea fishes may harbor symbiotic bioluminescent bacteria.

Name: Photophores of deep-sea fishes may harbor symbiotic bioluminescent bacteria.
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Photophores are specialized organs in the bodies of deep-sea fishes that produce light through bioluminescence. Some deep-sea fish have been found to have symbiotic bioluminescent bacteria living within their photophores, which produce the light. This helps the fish attract prey or communicate with other fish in the dark, deep waters.

Photophores of Deep-Sea Fishes May Harbor Symbiotic Bioluminescent Bacteria