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Sharks can detect a concentration as low as one part per billion of some chemicals, such as certain amino acids. The Blood Parrots really should not be with those other fish. SMELL A shark's primary sense is a keen sense of smell. He also said that their findings "busted the myths of the movies that sharks are these ruthless killers that just go crazy if they smell a drop of your blood." A shark's sense of smell functions up to hundreds of meters away from a source. Sharks have all the senses we have (smell, taste, touch, eyesight, and hearing). It can detect one drop of blood in a million drops of water (25 gallons or 100 liters) and can smell blood 0.25 mile (0.4 km) away. They can also sense electricity and vibrations in the water. Some sharks can smell one part of blood in 100 million parts of water and can tell which direction that smell is coming from. A a study in Zoology revealed—researched measured the bite force of 13 different species of sharks—an eight-foot-long great white bites with 360 pounds of force, but a nine-foot-long bull shark has a bite force of 478 pounds. They are well-known for their ability to detect minute quantities of substances such as blood in the water. Sharks have been called “swimming noses” because their sense of smell is so good (they smell with their nostrils but don’t breath through them). Sharks, for example, can’t actually detect a single drop of blood in the ocean from miles away (in certain conditions, the best they can do is sniff out blood at one part per million). He also said that their findings "busted the myths of the movies that sharks are these ruthless killers that just go crazy if they smell a drop of your blood." "So this busted the myths of the movies that sharks are these ruthless killers that just go crazy if they smell a drop of your blood." However, cow blood was used instead of human blood because “all mammal blood essentially smells the same to sharks," Rober explained. As fierce as they may be, pound-for-pound, great white sharks do not have the strongest bites in the ocean. Humans have a few things we can smell in a few parts per billion, skunks being a good example. As for blood, it likely does not render a piranha senseless as the movies would suggest, but piranhas can smell a drop of blood in 200 liters of water. What is likely happening is that the sharks can smell the blood but it’s just not in a quantity that is interesting to them especially since they don’t love human blood that much (btw, I spoke with a marine biologist and mammal blood is all the same from a chemical marker stand point so cow blood is a suitable substitute for human blood). In the now-viral 18-minute video, Rober said it's also "really hard to legally find five gallons of human blood." I'm not sure what type shark you have but generally speaking they like to have longer tanks where they can swim the length and they are usually hyper active swimmers. The experiment was conducted with three surfboards - each containing something different. They are peaceful and ill equipped to defend themselves from more aggressive fish like sharks and Oscars. This is specifically for blood to help them find dying prey. Cool Love sharks, here we go: So as others have stated sharks do have a great sense of smell and can detect very small amounts of blood in the water, talking a few parts per billion. Sharks have an acute sense of smell. Most read in News. Most read in News Exclusive MEL BREAKS LOOSE 18-Minute video, Rober said it 's also `` really hard to legally find five gallons of human blood ''! Other fish also sense do sharks go crazy when they smell blood and vibrations in the water, such as certain amino acids white sharks not! 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