Jellyfish: Mysteries of the Ocean's Unique Invertebrates

Jellyfish are ancient, diverse marine creatures found worldwide. They are invertebrates, not true fish, and consist mostly of water. Some jellyfish can reproduce both sexually and asexually, with the Turritopsis dohrnii known for its ability to reverse aging. Box jellyfish are highly venomous, causing numerous stings annually. Jellyfish lack complex organs but have basic sensory structures. They often form large blooms, impacting marine environments and human activities. Despite extensive research, many jellyfish species remain undiscovered.

What is a common misconception about jellyfish?

• They are found only in deep oceans.

• They have a backbone.

• They are a type of fish.

• They have complex brains.

What is the term used for the jelly-like material that makes up jellyfish?

• Keratin

• Chlorophyll

• Collagen

• Mesoglia

How can the immortal jellyfish reverse its aging process?

• Through photosynthesis

• By hibernating

• Through transdifferentiation

• By shedding its skin

What is the most venomous marine animal in the world?

• Box Jellyfish

• Blue-ringed Octopus

• Stonefish

• Great White Shark

What is the estimated number of jellyfish stings reported annually?

• 50 million

• 100 million

• 150 million

• 200 million

What percentage of a jellyfish's body is water?

• 95%

• 80%

• 70%

• 60%

What happens to a jellyfish when it washes up on the beach?

• It grows larger

• It evaporates

• It becomes more solid

• It turns into sand

What are groups of jellyfish called?

• Herds

• Blooms

• Pods

• Schools

What is a potential consequence of a dense jellyfish bloom?

• Increased fish population

• Clogging of fishing equipment

• Decreased ocean temperature

• Improved water quality

What is the primary reason scientists believe jellyfish congregate in blooms?

• To migrate to warmer waters

• To avoid predators

• For mating purposes

• To hunt for food