Did u know that a shark detect one part of blood in 100 million parts of water ? yeah, its a real fact. Though the blood would diffuse in water, but wouldn’t at least a particle of the blood have to come into contact with the shark. The smell organs in the noses of sharks are able to detect one droplet of blood in one million drops of sea water. So they often attracted to chemicals found in the guts of animals and loiter near sewage outlets.
