Question

Known as the twilight zone, the mesopelagic zone meets the photic zone above and becomes very dark as depth increases. Temperature decrease; pressure increases. Because nutrients are limited here, some animals rise to the photic zone at night for food. Many animals in this subzone can eat animals larger than themselves because they are equipped with large sharp teeth with expandable jaws and stomachs. Another key physical feature of animals living in this zone is ____________, which has a variety of purposes, including predator deterrence, communication, and lures for prey. A) symbiosis B) transparency C) bioluminescence D) oversized scales

Answer 1

The correct answer should be C. bio-luminescence

They have this ability because the parts that are shiny are meant to be like bait for other animals and when they come near to eat it or check it out they get eaten by the entire fish which is much larger than its bioluminescent part.

Answer 2

Bioiluminescence, meaning the ability to produce light. they live in depth of 200 to 1000 metres below the ocean surface, and there's very limited light there, so in order to be able to live in such a poor lit space they've developed that ability