I can't embed them here, so you'll need to go to the links. The one posted today is of humpback whales battling for the right to mate with a female. The "battles" per se are not dramatic or bloody - mostly pushing and shoving - but these are 40-ton creatures, and just the "call" of the female (slapping the water with her fin like a beaver slaps with its tail) is impressive. One also has to admire the enthusiasm/bravery of the divers who entered the water (without scuba gear) to do some of the filming. The mating itself is not on the video (has never been filmed). The excerpt is from the David Attenborough-hosted BBC series "Life."
While I was viewing that video I noticed a sidebar link to an older one - a brief clip of a white humpback whale off the coast of Queensland.