Think you've learnt a lot about dolphins?
Well, test your knowledge with this quiz.
1. Around how many years ago did the first dolphins evolve?
A. Over 92 million years.
B. About 55 million years.
C. Around 15 million years.
2. About how many different types of dolphin are there?
A. About 14.
B. Between 80 and 100.
C. Over 30.
3. Were is the dolphin's blowhole?
A. On the nose, or snout.
B. On the Dorsal fin.
C. On top of the head.
4. What type of skin does a dolphin have?
A. Smooth and velvety.
B. Loose and winkled.
C. Tight with thin, dark hairs.
5. For how long have humans hunted whales and dolphins?
A. The last 5 to 9 years.
B. Over 1,200 years
C. For hundreds of years.
6. Dolphin's teeth are...
A. All the same size and a cone shape.
B. All different shapes and sizes.
C. The same size, with different shapes.
7. A dolphin's tail moves...
A. Up and down.
B. Side to side.
C. Both ways.
(Answers: 1:B, 2:C, 3:C, 4:A, 5:C, 6:A, 7:A)