Understanding Fish Sleep

Why don't fish have eyelids like terrestrial animals?

• Because they sleep with their eyes open

• Because they don't need to keep their eyes moist underwater

• Because they are always awake

• Because they have a different way of seeing

Which fish is known to have trouble sleeping?

• Shark

• Parrotfish

• Zebrafish

• Tuna

How do parrotfish protect themselves while sleeping?

• By hiding under rocks

• By swimming continuously

• By building a cocoon of mucus

• By resting on the ocean floor

What is a unique sleeping habit of sharks?

• They sleep on the ocean floor

• They keep swimming while asleep

• They rest motionless in the water

• They hide in crevices

Why is sleep important for fish?

• To repair their cells and conserve energy

• To avoid predators

• To help them swim faster

• To improve their vision