North American sunfish invades Ukraine, threatens native fish

The invasive sunfish, a predator from North America, is rapidly spreading throughout Ukrainian waters, posing a threat to native fish populations. This sunfish, known for its vibrant appearance, aggressively displaces local species and consumes herbivorous fish, according to reports from Ukrainian fishing groups. Its adaptability allows it to thrive, though the exact introduction method remains unknown. The sunfish, introduced in the late 19th century, can grow up to 41 cm and is considered a nuisance due to its impact on fish stocks, despite being edible.