shark that has venom in its spine and can cause serious harm to humans.Living in the River Thames is a breed of shark known as the Spiny Dogfish – aka Spurdog shark.
The shark gets its name from the spines in front of its dorsal fin, which it can use to defend itself by curling into a ball and striking viciously at a predator, My London reports.
It has a pointed snout, large eyes, a streamlined body and is a greyish-brown colour on top, with a lighter belly, and rows of white spots down its sides.
The Spurdog is one of very few venomous fish found in UK waters along with the Stingray and Weever fish. It is believed the sharks use the Thames estuary to give birth and nurse their young thanks to the improving water quality and higher oxygen concentrations in recent years.
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