Prehistoric monsters reappear in English rivers

Rocky grouper, an exotic fish that dates back to prehistoric times, was caught in some English rivers after being absent from the 1800s.

Re-grouper in UK

Rocky snakes are snake-like, living 200 million years ago, before both the dinosaurs and the world's oldest vertebrate. Previously, rocky grouper is a very popular species in the rivers of England.

Rocky grouper has reappeared in some English rivers.(Photo: Dave Herasimtschuk).

A special feature of this "living fossil" is that they have razor-sharp teeth in a circle instead of a jaw. They were severely affected by pollution during the Industrial Revolution and construction of dams prevented them from migrating. Currently, rocky grouper is in danger of extinction in Europe.

However, according to the UK Environmental Protection Agency, this fish is slowly returning to its old habitat because of the level of pollution in rivers falling to the lowest level in more than 100 years and the migration barrier is removed. revoke.

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Protective measures include testing using cone-shaped bricks, allowing the grouper to use the suction-like mouth to anchor the body as it crawls forward. The initial results on the Derwent River in Toronto are very encouraging.

Sardines play an important role in the treatment of nutrients in rivers and provide food for other fish. This strange-shaped creature was once considered a luxury dish for British, Viking and Roman kings and queens. It has been suggested that King Henry I of England died after eating too many rocky grouper.