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johnjvv

Greenland Sharks

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WTH are they doing with laser pointers underwater?

 

Apparently Inon Z 220 has a built in laser pointer option...it seems like there is still a remnant of this on the 240's but not working (or I dont know what the little flip thing is on the strobe face).

 

These guys sell an underwater laser point....think I know what I want for Christmas now!!! :)

 

http://www.betapointer.com/diver.htm

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The video is even more interesting...until the last sequence. WTH are they doing with laser pointers underwater?

 

I remember seeing a guy on a show trying to measure big crocodiles with laser pointers, I think they are trying to do the same with the shark.

Unfortunately, you need to know the angle between the laser and the subject or the measurement will be inaccurate.

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These guys are the reason for the decline of seal populations in Spitsbergen. Apparently their very well developed smell lets them sneak up on sleeping seals at night.

 

I have them in a fjord a few hours from here but way to deep for a dive. They cant tolerate temperatures much above freezing and will not venture shallow enough here.... to bad ;-(

 

Cheers,

Espen

 

 

 

 

 

 

 

 

I saw this article and never knew these existed!! Pretty cool pictures...

 

 

http://www.dailymail.co.uk/news/article-20...les-camera.html

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Hmmnnn...

 

... just remember that the Daily Mail doesn't seem to think that global warming is real and does seem to believe that anyone with an interest in the environment is three-quarters of the way to being a Communist!

 

A pinch of salt is sometimes required...

 

Tim

 

:)

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There was a programme on national geographic channel called predator csi: Corksrew seal killer anout these sharks that was worth a look. Mark

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Im wondering how on earth with those small mouths those sharks can eat anything but small fish.

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