Well it is spawning time for arctic char. These videos are made by divers/flyfishermen of one of the four species of char that live in this lake and this species is unique it can only be found in this lake. These fish are great fighters they never give up and they can get really big they sometimes rival the huge brown trouts in size also found in this lake. This lake Thingvallavatn and place Thingvellir is my favorite spot on this planet.

http://www.youtube.com/watch?v=lEIzE3tL6iU&feature=fvsr
http://www.youtube.com/watch?v=NeD5jN55uX4
http://www.youtube.com/watch?v=wj14jgWbUxk
http://www.youtube.com/watch?v=Th-WzisG3Hw
http://www.youtube.com/watch?v=xhb-f_wjG5o

If you get some message like this video is not available in your country just search for "Arctic Char Thingvellir Iceland".

Enjoy.