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Sharks
Oceanography Shark Unit
| Question | Answer |
|---|---|
| Are sharks considered fish? | Yes, all Class Chondrichthyes are fish |
| What does Chondrichthyes mean? | Cartellagenous Fish |
| Is there more salt in the ocean or in a fish? | the ocean. Fish use osmoregulation to eliminate salt from their body. |
| Are shark attacks common or rare? | Rare - fewer than 100 per year |
| Do sharks have a swim bladder? | No, they use the oil in their liver to adjust for depth. |
| Can sharks stop and rest? | Many can stay still - if they have the spiracle. Others must keep moving. |
| How long is the smallest shark? (the pygmy) | 9 inches long |
| What shark is most dangerous to humans? | Great White Shark |
| How many shark species are there? | 360 species |
| What is a shark's skeleton made of? | Cartilage |
| What is the world's largest fish? | Whale Shark |
| Evidence for sharks goes back how many years? | 450 million years |
| What shark can move between fresh and salt waters? | Bull Shark |
| What is another name for Caudal fin? | Tailfin |
| What are claspers used for? | Mating |
| Where is the fin spine located? | In front of the First Dorsal Fin |
Created by:
tejneckyc
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