What Is a Fish?: Different Types of Fishes

The video tutorial explains the diversity of fish, highlighting over 30,000 species. It categorizes fish into groups based on characteristics: jawless fishes like lampreys, cartilaginous fishes such as sharks, and bony fishes. Jawless fishes have suction cup-like mouths, while cartilaginous fishes have skeletons made of cartilage. Bony fishes, the most diverse group, have skeletons made of bone and inhabit both freshwater and saltwater environments.

How many different kinds of fishes are there?

• 30,000

• 40,000

• 20,000

• 10,000

What is a unique feature of jawless fishes like the lamprey?

• They have a regular mouth.

• They have a suction cup-like mouth.

• They have fins like a shark.

• They have a hard shell.

Which group do sharks belong to?

• Bony fishes

• Jawless fishes

• Cartilaginous fishes

• Invertebrates

What material are the skeletons of cartilaginous fishes made of?

• Wood

• Bone

• Cartilage

• Metal

Which type of fish is most likely to be caught while fishing?

• Invertebrates

• Bony fishes

• Cartilaginous fishes

• Jawless fishes