Fish Classification

What type of fish are Chondrichthyes?

• Bony fish

• Cartilaginous fish

• Jawless fish

How many species of Agnatha are there?

• around 50 species

• around 200 species

• around 10 species

• around 500 species

Osteichthyes are also known as ______ fish.

• bony

• cartilaginous

• scaly

• jawless

Which of the following fish belong to the group Chondrichthyes (cartilaginous fish)?

• Salmon, Tuna, Cod

• Sharks, Skates, Rays

• Goldfish, Catfish, Eel

• Trout, Perch, Bass

What are the skeletons of Chondrichthyes made up of?

• Cartilage

• Bone

• Chitin

• Calcium carbonate

Only the teeth of Chondrichthyes are calcified, rarely the vertebrae.

• True

• False

Fill in the blank: Sharks do not have scaly skin; their skin is made of dermal denticles (little teeth), and is ___ to touch.

• rough

• smooth

• sticky

• slippery

Fill in the blank: Sharks do not have a ___, so they have to keep swimming or they will sink.

• swim bladder

• backbone

• gill cover

• tail fin

Fill in the blank: Sharks have ___ nostrils.

• paired

• single

• triple

• quadruple

Which of the following is a large species of shark found in British waters?

• Blue shark

• Lesser-spotted dogfish

• Smooth hound

• Tope