There are more than 400 known species of sharks inhabiting our planetâ??s marine ecosystems but detailed knowledge about most sharks is considerably lacking. Biologists often encounter barriers to studying sharks in captivity and in the wild due to factors such as their large size, relatively low demand in commercial markets, fast speeds, and wide habitat ranges.
There are more than 400 known species of sharks inhabiting our planetâ??s marine ecosystems but detailed knowledge about most sharks is considerably lacking. Biologists often encounter barriers to studying sharks in captivity and in the wild due to factors such as their large size, relatively low demand in commercial markets, fast speeds, and wide habitat ranges.
