The video tutorial discusses various animals that inhabit the sea, including fish, mammals like dolphins, and reptiles such as sea snakes and turtles. It provides an overview of how these animals are classified and highlights the diversity of marine life.

Which of the following is a characteristic of animals classified as fish?

• They give birth to live young.

• They are warm-blooded.

• They have lungs and breathe air.

• They have scales and gills.

What is a unique feature of dolphins compared to other sea animals?

• They are mammals.

• They are cold-blooded.

• They have scales.

• They lay eggs.

Which of the following is NOT a marine mammal?

• Seal

• Sea snake

• Whale

• Dolphin

What type of animal is a sea snake?

• Reptile

• Mammal

• Amphibian

• Fish

Which of these animals is known for having a hard shell?

• Dolphin

• Octopus

• Sea turtle

• Shark