Flashlight Fish Flashlight fish not only carry their own light, but they can turn it on and off at will. That's because they have a special flap of muscle that can be raised and lowered like a window shade to cover the pockets of glowing bacteria beneath their eyes. Small prey are attracted to this pale green glow. The light also helps flashlight fish see and catch their prey. Comb Jelly Not all bioluminescent ocean animals are fish.
Bioluminescence is almost always blue.
This comb jelly probably uses bioluminescence to scare off predators. This shrimp is actually vomiting bioluminescence onto an attacking fish.