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Sharks belong to the [[holobaramin]] that also includes skates and rays.
Sharks belong to the [[holobaramin]] that also includes skates and rays.
==Environmental Concerns==
Worldwide, sharks suffer threats from over-fishing, mercury poisoning, and disturbances due to [Climate change]<ref>http://www.ceibahamas.org/shark-ecology.aspx</ref>. Many individual shark species are currently threatened or endangered, often because of human activities such as careless fishing practices and coal fired plants dumping tones of toxic mercury into the oceans.
</references>
[[Category:Sharks]]
[[Category:Sharks]]