European catfish has prolonged breeding season, enhancing its invasive potential

The European catfish is the largest freshwater fish in Europe, reaching up to 2.8 meters in length and 130 kg in weight. It was first detected in Portugal in 2014. As a top predator, it has no natural enemies and exhibits high fecundity, with females capable of producing up to half a million oocytes (unfertilized eggs).

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