Numbers of some shark species have dropped as much as 80% over the last 50 years.

And more than a third of shark species are endangered.

These sharks live farther north than any other shark species.

And a few existing shark species, such as the hornshark, have kept the same basic physical characteristics for more than 150 million years.

Here, a geologist collected ca. 60 000 teeth of various shark species in the 19th century.

The great white has a certain notoriety for being the only shark species to attack humans without apparent cause.

There are variations in the extent of oophagy among the different shark species.

It is one of the shark species marketed as "flake".

In the process, you become part of the shark species, too.

These reports, however, may need positive identification of the shark species involved.