Question

deep sea zones: a virtual field trip
website: https://www.naturalworldfacts.com/the-deep-sea-zones
directions: use the website above to answer the questions for each of the five deep sea zones.
part 1: epipelagic (sunlight zone)

1. what is the main characteristic of this zone? why is it nicknamed the \sunlight zone\?
2. what is the primary source of food for organisms in this zone?
3. name two organisms that live in the sunlight zone.

part 2: mesopelagic (twilight zone)

1. how much sunlight reaches this zone? what is the purpose of the bioluminescence of many animals found in this zone?
2. describe the process of the \daily vertical migration.\ why do animals do this?
3. name two organisms that live in the twilight zone.

part 3: bathypelagic (midnight zone)

1. how does the temperature and pressure in this zone compare to the zones above?
2. what is the only source of light in this zone? how do organisms use this light?
3. name two organisms that live in the midnight zone.

part 4: abyssopelagic (abyssal zone)

1. what does the word \abyss\ mean?
2. describe the environment in the abyssal zone. what are two major challenges organisms face here?
3. name an organism that lives in the abyssal zone.

Explanation:

1. The Epipelagic zone gets sunlight, enabling photosynthesis which is the primary food - making process. Common organisms include dolphins and jellyfish.
2. In the Mesopelagic zone, only a small amount of sunlight penetrates. Bioluminescence is used for communication, attracting prey, and camouflage. Daily vertical migration is when animals move up at night to feed in the shallower, more food - rich waters and return to deeper, safer waters during the day. Organisms like lanternfish and anglerfish live here.
3. The Bathypelagic zone has lower temperatures and higher pressure than the zones above. Bioluminescence is the only light source, used for similar purposes as in the Mesopelagic zone. Organisms such as gulper eels and vampire squids are found here.
4. "Abyss" means a deep or bottomless chasm. The Abyssal zone is cold, dark, and has extremely high pressure. Organisms face challenges like finding food and withstanding pressure. An example of an organism is the abyssal grenadier.

Answer:

1. Main characteristic: Sunlight can penetrate. Nicknamed "Sunlight Zone" because sunlight reaches it. Primary food source: Photosynthesis. Organisms: Dolphins, Jellyfish.
2. Sunlight: Only a small amount reaches. Purpose of bioluminescence: Communication, attracting prey, camouflage. Daily vertical migration: Animals move up at night to feed in shallower waters and return to deeper waters during the day for safety. Organisms: Lanternfish, Anglerfish.
3. Temperature and pressure: Lower temperature and higher pressure than zones above. Light source: Bioluminescence. Use of light: Similar to Mesopelagic zone purposes. Organisms: Gulper eels, Vampire squids.
4. "Abyss" meaning: A deep or bottomless chasm. Environment: Cold, dark, high - pressure. Challenges: Finding food, withstanding pressure. Organism: Abyssal grenadier.