What is Bioluminescence?

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About Bioluminescence:

It is a natural phenomenon produced by certain marine organisms, primarily microscopic plankton called dinoflagellates.
These planktons emit light on the ocean surface at night.
Bioluminescence is widespread among deep sea animals in general.
Many marine creatures like sponges, jellyfish, worms, species of fish, anthropods, echinoderms and unicellular alga exhibit bioluminescence to either evade predators, attract prey or during mating.
This occurs when the luciferase enzyme reacts with the luciferin compound in the presence of oxygen to produce a cold light.
This is widespread in lagoons and sometimes breakwaters and is particularly visible during warm weather conditions.
The dinoflagellates follow a circadian cycle (24-hour cycle) and as a result this phenomenon occurs during the night which is visible in low light conditions.
This unique phenomenon has been visible in some other beaches in India including Havelock Island in the Andamans, Thiruvanmiyur beach in Chennai, Mattu beach in Karnataka and Bangaram Island in Lakshadweep.

Q1: What are Arthropods?

These are invertebrates with jointed legs. They make up about 75% of all animals on Earth and have a major role in maintaining ecosystems as pollinators, recyclers of nutrients, scavengers and food for other animals.

News: Chennai beaches lit up by enchanting bioluminescence: What is it?