A lot of bacteria glow for a very strange reason, they want to get eaten! The benefits of bioluminescence for marine bacteria have not been elucidated fully. One of the explanations is that attracts fish to consume the luminous material.
Zooplankton which eat the bioluminescence marine bacteria, aren’t able to digest them. They survive digestion!
The bacteria continue to grow, and over time light up the zooplankton.
In turn, predator fish are attracted to the illuminated zooplankton and eat them.
“As far as the bacteria are concerned, their access to the fish digestive systems is like reaching ‘paradise’ – a safe place, full of nutrients, and also a means of transport into the wide ocean,” explained Prof. Genin, one of the researchers.