Bull shark in Dutch lake?

In this 31 March 2016 video, a Dutch wildlife warden talks about the Kolkven lake in the Kampina nature reserve in North Brabant province. Recently, a photo was made of a shark‘s fin protruding out of the water there. Probably, a bull shark, a species often held in aquariums, has been freed in the lake after growing too big for the aquarium.

Stay tuned, the warden says.

However, it turned out to be an April Fools’ Day joke. So, a ´bullshit´ shark.

This 2010 video from Africa is about swimming with bull harks.

Another video used to say about itself:

9 March 2015

This documentary looks at the bull shark (Carcharhinus leucas), also known as the Zambezi shark or, unofficially, as Zambi in Africa and Nicaragua shark in Nicaragua. It is a requiem shark commonly found worldwide in warm, shallow waters along coasts and in rivers. The bull shark is known for its aggressive nature, predilection for warm shallow water, and presence in brackish and freshwater systems including estuaries and rivers. This is the full bull shark documentary.

Bull sharks can thrive in both saltwater and freshwater and can travel far up rivers. They have even been known to travel as far up the Mississippi River as Illinois, although there have been few recorded freshwater attacks. They are probably responsible for the majority of near-shore shark attacks, including many attacks attributed to other species.

Unlike the river sharks of the genus Glyphis, bull sharks are not true freshwater sharks, despite their ability to survive in freshwater habitats.