Unusual Animal Migrations: Jellyfish Blooms

1. What ecological role do jellyfish blooms play?

A) They eliminate oxygen from water.
B) They can provide food for certain species.
C) They filter pollutants from water.
D) They act as predators to most fish.

2. Which factor can lead to increased jellyfish populations?

A) Eutrophication
B) Reduced salinity
C) Cold water currents
D) High pH levels

3. Where are jellyfish blooms most commonly observed?

A) Open ocean
B) Coastal areas
C) High mountain streams
D) Freshwater lakes

4. Which region has reported significant jellyfish blooms?

A) The Arctic Ocean
B) The Black Sea
C) The Amazon River
D) Lake Baikal

5. Why do jellyfish have a high reproductive potential?

A) They migrate during breeding season.
B) They have a slow growth rate.
C) They require complex mating rituals.
D) They can reproduce both sexually and asexually.

6. Which of the following is a method to study jellyfish migration?

A) Radioactive tagging
B) Satellite tracking
C) Underwater sound monitoring
D) Airborne surveys

7. What does the term 'medusa' refer to?

A) A type of jellyfish predator.
B) The mature, free-swimming stage of jellyfish.
C) The larvae stage of jellyfish.
D) The polyp stage of jellyfish.

8. What adaptation helps jellyfish in open waters?

A) Their strong propulsion ability
B) Their ability to drift with currents
C) Their ability to swim against strong currents
D) Their thick gelatinous bodies

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