Dolphin saves swimmers from sharks?

http://www.cbc.ca/world/story/2004/11/24/dolphin_newzealand041124.html

this is not a one off incident, dolphins keep saving humans from many tragedies..like during the great tsnami, it saved many boats from going towards shore during the tsunami.

please sign this petition against dolphin killings in Denmark

http://www.petitiononline.com/Dolphend/petition.html