Understanding Jellyfish Behavior and Biology

Jellyfish have been around for millions of years, predating dinosaurs. They inhabit oceans worldwide, thriving in both warm and cold waters. Jellyfish come in various colors and some can even produce light. They resemble umbrellas and vary in size. As invertebrates, they lack a spine, brain, eyes, heart, or bones, but have a central mouth for eating and waste expulsion. Jellyfish move by riding ocean currents or squirting water from their mouths. Their tentacles contain stinging cells to capture prey. Jellyfish can be found in shallow and deep waters, often near shores. While they don't attack humans intentionally, their stings can be painful. It's important to maintain a safe distance from them.

How long have jellyfish existed on Earth?

• Since the ice age

• For a few centuries

• For millions of years

• Since the time of the dinosaurs

What unique ability do some jellyfish have?

• They can talk

• They can glow

• They can change shape

• They can fly

Which of the following is NOT a characteristic of jellyfish?

• They have a spine

• They have no bones

• They lack a brain

• They have a mouth

How do jellyfish primarily move in the ocean?

• By walking on the ocean floor

• By swimming with fins

• By riding ocean currents

• By flying above the water

What is the purpose of the stinging cells in jellyfish tentacles?

• To communicate with other jellyfish

• To help them swim faster

• To attract mates

• To stun prey

Where can jellyfish be found in the ocean?

• Only in deep waters

• Only near the shore

• Only in shallow waters

• In both shallow and deep waters

What should you do if you see a jellyfish at the beach?

• Capture it

• Give it space

• Touch it gently

• Feed it

Do jellyfish intentionally attack humans?

• Yes, they are aggressive

• Only at night

• No, they do not

• Only when provoked

What is a common reaction to a jellyfish sting?

• It is very painful

• It causes a rash

• It causes itching

• It is painless