Poisonous sharks found in London’s River Thames


In 1957, the river in the capital was declared “biologically dead.” Photo: Agency.

International.- The famous London river is more exciting than we thought. Poisonous seahorses, eels, seals and sharks have been discovered in the Thames, according to the results of a “health check.”

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A study by the Zoological Society of London (ZSL) revealed “positive news” for wildlife and ecosystem recovery, the society reported Wednesday.

In 1957, the river in the capital was declared “biologically dead.”

Poisonous sharks

But now surprising creatures have been found, such as sharks, among which are the dogfish, caella and spiny dogfish, a thin fish about 60 centimeters tall and covered in poisonous spines.

Spiny dogfish are found in deep water, and the spines in front of the shark’s two dorsal fins secrete a venom that can cause pain and swelling in humans.

The dogfish, which feeds on fish and crustaceans and can grow to 1.8 meters and weigh up to 48 kilos, has never launched an unprovoked attack on humans, according to the British organization Wildlife Trusts.

For its part, the caella shark, also known as the toothed musole, which can measure up to 1.2 meters and weigh 11 kilos, feeds mainly on crustaceans, shellfish and mollusks.

However, the number of fish species found in the river’s tidal zones has shown a slight decline, and conservation scientists have warned that more research is needed to understand why.

This 346-kilometer river, which is home to more than 115 species of fish and 92 species of birds, faces threats from pollution and climate change, ZSL warned.

The river also provides clean water, food, livelihoods, and protection from coastal flooding to surrounding communities.

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