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Yes they do. Sharks have a keen sense of smell and can smell blood in the water from miles away.
No. Although Bull Sharks can survive in fresh water, the Yellowstone River is too far away from salt water for the Bull Shark to get to the Yellowstone River.
Sharks do not have the ability to sense HUMANS are in the water... They have a sensory that makes it able for them to sense when things are moving in the water. They do not know what you are what they see you as is food... :)
passing strong sound vibrations through water.
They are called swell sharks because when they see a predator they swell up with water (or maybe oxygen I'm not sure) so that they appear bigger and scare it away.
yes
No not really and they could only if they catch a little drop of blood in nearby water of the mammal it will attract many sharks.
Yes. Many sharks live in the salt water ocean off the coast of Jamacia.
All sharks (except the San Jose Sharks) live in water
there are two type of sharks sea or salt water sharks live in the sea wherelse fresh water sharks are available in aquarium shops , fresh water sharks are smaller in size about 12 cm in length
Yes. Red Tailed Sharks are fresh water.
it depends, if the dolphin is swimming pretty fast away from something then you know you should probably swim away too..