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MYTH VS. FACT. http://www.youtube.com/watch?v=kbD-jb- ovOo. Usually a shark preys on humans?. No, most are scared of humans. Hammerheads are very large, but usually nice to humans. Bubbles from divers tanks initiate sharks attacks?.
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MYTH VS. FACT http://www.youtube.com/watch?v=kbD-jb-ovOo
Usually a shark preys on humans? No, most are scared of humans. Hammerheads are very large, but usually nice to humans.
Does the oil in a sharks liver make them heavier or lighter? Lighter
Sharks can’t go in fresh water because…? There is no salt They can breathe Other
Why do sharks migrate? Can have more than one answer… Follow prey Reproduce Safety Different temperature of water They don’t migrate
How many species of cartilaginous fish are there in the world’s waters? 2000 1150 1870 1170
Sharks live in what temp and depth? Deep water Cold water Warm water Shallow water All of the above
Which method of fishing has the highest bycatch of sharks? Choose all that apply Shark finning Gillnets & longlines Bottom trawl All of the above
Which class do sharks, chimaeras and batoids belong to? Cartilaginous Osteichthyes Cretaceous Crustaceans
In Costa Rica there are sharks that can walk on land and survive without salt water for more than 3 hours? http://books.google.co.cr/books?id=NfQDAAAAMBAJ&pg=PA26&dq=sharks+in+costa+rica&hl=en&sa=X&ei=Xtd8U4aNH5WssQT60YHQDw&redir_esc=y#v=onepage&q=sharks%20in%20costa%20rica&f=false
How many of the cartilaginous fish in the world’s water are considered sharks? 400 470 520 375
Sharks have terrible eyesight? Sharks have great eyesight. Hammerhead sharks Sensory Organ: Eyes on edge of head Ampullae of Lorenzini: electric fields Helps find sting rays- diet carnivore http://animals.nationalgeographic.com/animals/fish/hammerhead-shark
Sharks stay very close to their babies once hatched? False, They leave their babies to fend for themsevles. Hammerhead Sharks Reproduction: Females: 20-40 pups at a time Separate from young quickly Survive b/c they are feared
Sharks only detect prey through smell and sight? They detect prey through electrical charges.
It has been recently proven that sharks cartilage can help cure cancer,
Great white sharks can grow larger than boats? http://www.sharks-world.com/great_white_shark_video/