After decades of mystery surrounding the perfectly circular wounds found on fish and marine mammals, researchers have finally identified the predator behind them. A new study conducted by scientists ...

When we think of shark bites, we often think of jagged teeth that tear at skin. However, this is not the case for the cookiecutter shark (Isistius brasiliensis). Though elusive, the cookiecutter shark ...

Cookie-cutter sharks were once known as cigar sharks, because nobody knew just how they ate. Once a biologist discovered their secret, it explained the mysterious deep holes made in the equipment of ...

Unlike the streamlined silhouettes of great whites or makos, Isistius brasiliensis looks almost unassuming, which makes the violence of its bite even more surprising. The shark’s lower jaw forms a ...

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