The helmet jelly, a type of jellyfish, will migrate from an ocean zone with limited light to the zone that has the most available light. which zones are the jellyfish moving between and why?

twilight zone and the Epipelagic zone

For food

Explanation:

The zones with in which the jelly fish is moving are twilight zone and the Epipelagic zone.  The Epipelagic Zone (i.e the sunlight zone) extends upto a depth of 300 meters from the surface of the ocean The phytoplanktons and the zooplanktons are mainly found in this zone due to the presence of sunlight to carry out photosynthesis. Since jelly fish mainly feed upon small plants i.e phytoplankton and crustacean i.e zooplanktons, it has to travel hence forth between the two zones for food.

it creates acid rain