Of the 368 species of sharks presently known, only about 20 are dangerous. And of these just four are responsible for most of the some 100 attacks on humans that are reported worldwide each year.
सध्या ज्ञात असलेल्या शार्कच्या ३६८ जातींपैकी केवळ २० जाती खरं घातक आहेत.