Brain Teasers
Sharkie
Dan and his best friend Dave were out fishing when they noticed a shark circling their dinghy. Whenever they tried to move the boat, the shark would barge into it, nearly causing it to capsize. "Never mind," said Dan. "If we wait long enough, it'll get tired, and while it's asleep we can sneak away."
Was this good advice?
Was this good advice?
Answer
No; sharks don't sleep.Hide Answer Show Answer
What Next?
View a Similar Brain Teaser...
If you become a registered user you can vote on this brain teaser, keep track of which ones you have seen, and even make your own.
Solve a Puzzle
Comments
I thought they did...just with their eyes open.
Don't they get tired? Maybe we should stop dumping caffeine into the ocean.
Julia's right. Sharks don't sleep because if they did they would sink to the bottom of the ocean/sea that they are in and are unable to get up, They then starve to death if they don't find enough scraps to survive. Great teaser.
Actually, while it is certain that they have to keep moving (except for nurse sharks, which have a special mechanism around their eyes to pump water to their gills), it is still deabted whether the sharks sleep or not. It is certain that they go into a deep rest phase, in which they still move instinctively.
way too easy, at least to me
Throw some chum Dave
When you say "sneak" didn't you mean walk? I mean you are in the middle of the sea, you can't sneak away, you would "row" away in the boat?
lol, I guess I don't know much about sharks, do I?
I would like to know why Dan and Dave were fishing in shark infested waters in just a dinghy?
I zero'd in on the answer without swimming around any.
I zero'd in on the answer without swimming around any.
Thanks, I learned something.
actually sharks, like many other fishes, do "sleep" though they don't lose consciousness. Instead, one half of their brain sleeps at a time, in a sort of "keeping watch" system.
This was in a Mensa puzzle book... verbatim.
That's a negative. Studies have shown that some species of sharks DO sleep, including the nurse shark
Though the shark will realize the boat is not food and lose interest very quickly to find real food (sharks don't even like human taste, which is why there are no documented cases of a human actually being eaten, only bitten and sometimes fatally). It is very good advice to say "wait."
Sharks DO sleep, but here's an interesting fact for you: Sharks never suffer illnesses of any sort. Great Job!
To post a comment, please create an account and sign in.
Follow Braingle!