Sloan's+Killer+Whale

I am a killer whale black and white as an old fashioned movie I glide like a competitive swimmer I jump like a track runner jumping over hurdles I have a blow hole that lets out air I can stay under water for 20 minutes when I am born I weigh 300 pounds I can see under water as in air I can find pray by echoes I can be a friend to people I am a killer Whale