Features of Fish: Cartilaginous Fishes

The video explores cartilaginous fishes, including sharks, rays, and skates, highlighting their unique characteristics such as a cartilage-based skeleton. It compares the body shapes and adaptations of sharks and skates, discusses the jaws and teeth of these fishes, and explains the feeding habits and oxygenation process in sharks. Additionally, it covers the well-developed sense organs of sharks that aid in predation.

What is the primary material that makes up the skeletons of cartilaginous fishes?

• Keratin

• Calcium

• Cartilage

• Bone

How do the body shapes of sharks differ from those of skates?

• Both sharks and skates have a torpedo-shaped body.

• Both sharks and skates have a wing-like body.

• Sharks have a torpedo-shaped body, while skates have a wing-like body.

• Sharks have a flattened body, while skates have a torpedo-shaped body.

What adaptation allows sharks to catch prey swiftly?

• Their sleek, streamlined bodies

• Their strong jaws

• Their whip-like tails

• Their flattened bodies

Which of the following sharks are known to be filter feeders?

• Hammerhead Shark

• Great White Shark

• Tiger Shark

• Basking Shark

What sensory ability helps sharks detect vibrations in the water?

• Lateral line system

• Sight

• Smell

• Hearing