Which is the largest species of fish in the world?

How many hearts does an octopus have?

Which underwater animal can live without a brain?

Which animal is known for being very friendly and playful?

Which is the main body part used by fish to breathe?

Which animal is the fastest swimmer?

Which underwater creature looks like a flower but is alive?

Which fish is famous for living among sea anemones?

Which of these animals are not fish?

Which animals can live both on land and in water?