Bioluminescence is the production of light by living organisms like glow worms, Fireflies etc. The light is produced when a substance called luciferin present in these organisms combined with oxygen in the presence of luciferase. light produced in this way does not give out any heat.
what is mermaid’s purse?
Mermaid’s purse is a hard cylindrical protective case for the eggs of some fish like dogfish raise etc. They remain attached to the seaweeds by long, curly strands present at both the ends till the embryos mature into fish capable of coming out into the water.
This whole process of transformation may take a period of 6 to 9 month.