In several types of marine animals, including squids and fishes, bioluminescent

Question

In several types of marine animals, including squids and fishes, bioluminescent bacteria such as Vibrio fischeri have symbiotic relationships with these organisms and produce light, in a process that is different from that in some other animals, such as jellyfish and fireflies. Many of these species of bacteria can also be free-living organisms found in ocean water. When these bacteria are found free-living in the ocean, they do not light up. Explain why they can produce light when found in marine animals but they do not produce light when found free-swimming in the ocean.

Explanation / Answer

When these bacteria is found in symbiotic relationship with marine organisms such as squids, fishes , bacteria used this mechanism to get entry into other organism, for their survival, dispersal and persistence.. They enter the gut of marine organisms and live in symbiotic relationship. They get the food from host and in turn host use their bioluminescene to escape from predator and dispersal. But when bacteria is not in a relationship, it will not used specific ability because it is not work for bacteria.

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