Are sharks attracted to human blood?

Human blood did not attract them at all. Sharks attracted by fish blood. They then retried, in the same place, the same experiment, but replacing the human blood by barracuda's blood. And then the sharks were very responsive, they quickly turned to the source of the blood, and, all excited, began to circle around the bloody area. read more

However, reports that sharks can smell a single drop of blood in the vast ocean are often exaggerated. One would need to be bleeding an awful lot to really attract sharks. While sharks may be attracted by blood, it mostly means that there is potentially food available to them in the area. read more

PLAUSIBLE: Sharks are attracted by blood It has been said that human blood will attract a shark from kilometres away. This hasn’t been our experience, but perhaps we’ve never bled enough to be attractive. read more