What makes Palau's Jellyfish Lake special?

Millions of golden jellyfish with mild stings

Jellyfish Knowledge Quiz – Test the Details

Jellyfish drifted through the oceans long before dinosaurs, fish or even trees, and this jellyfish knowledge quiz explores how they survive without brains, hearts or bones. Swim through Jellyfish Lake in Palau, meet the deadly box jellyfish of Australia and the immortal jellyfish that can turn back time.

Start Jellyfish Knowledge Quiz

🎯 Daily Trivia Challenge • 🧠 10 Questions • ⏱️ 150 Seconds

Question 1 / 10 Time: 150s

Age
How long have jellyfish existed?
Brain
What do jellyfish lack?
Water
About how much of a jellyfish is water?
Immortal
Which jellyfish can revert to an earlier life stage?
Box
Which jellyfish is among the most venomous animals?
Largest
Which is among the largest jellyfish?
Palau
What makes Palau's Jellyfish Lake special?
Sting
What do jellyfish use to sting?
Group
What is a group of jellyfish called?
Turtles
Which animal eats jellyfish and can be harmed by plastic bags?

Explanations: answer key for all 10 questions

Q1: How long have jellyfish existed?
Answer: Over 500 million years
They are among the oldest animals.
Q2: What do jellyfish lack?
Answer: A brain, heart and bones
A nerve net controls them.
Q3: About how much of a jellyfish is water?
Answer: About 95%
They dry up quickly on land.
Q4: Which jellyfish can revert to an earlier life stage?
Answer: Turritopsis dohrnii
It is called the immortal jellyfish.
Q5: Which jellyfish is among the most venomous animals?
Answer: Box jellyfish
It lives off northern Australia.
Q6: Which is among the largest jellyfish?
Answer: Lion's mane jellyfish
Its tentacles can exceed 30 meters.
Q7: What makes Palau's Jellyfish Lake special?
Answer: Millions of golden jellyfish with mild stings
Their numbers fell during droughts.
Q8: What do jellyfish use to sting?
Answer: Nematocysts
They fire like tiny harpoons.
Q9: What is a group of jellyfish called?
Answer: A smack or bloom
Blooms can clog fishing nets.
Q10: Which animal eats jellyfish and can be harmed by plastic bags?
Answer: Leatherback turtle
Bags look like jellyfish.

Jellyfish Knowledge Quiz – Drifting Through Time

Jellyfish are soft-bodied animals that have drifted through the oceans for over 500 million years. They have no brain, heart or bones, and their bodies are about 95% water, controlled by a simple nerve net.

Jellyfish catch prey with tentacles armed with stinging cells called nematocysts. Some, like the box jellyfish, have deadly venom, while others are harmless. The immortal jellyfish can reverse its life cycle, turning back into a younger stage.

Jellyfish blooms are growing in some areas, possibly due to overfishing, warming seas and pollution. They are food for sea turtles and fish, and scientists study their glowing proteins and simple bodies to learn about evolution and medicine.

What This Quiz Teaches

Ocean fans and students will enjoy these questions.

How old jellyfish are
What they lack
How they sting
Which is immortal
Which is most dangerous

Did You Know?

Some jellyfish glow.
Box jellyfish have 24 eyes.
Jellyfish have been to space.
Upside-down jellyfish host algae.
Comb jellies are not true jellyfish.