In the Ukrainian rivers now you can catch not only carp, but exotic predator - piranha fish. In the Dnieper river appeared unusual for our edges subtropical species of fish: from fifty-six native species living in the river, among other features jellyfish, piranhas, snakeheads.

Ichthyologist Roman Novitsky says that in recent years there have been eighteen species of fish and two species of crabs, which earlier were not found. "Some have brought, other seized new territory independently. If four or five years ago the sun perch (live in subtropical waters), introduced from North America, was for us a great rarity, but today it can be found everywhere," says Novitsky.

This fish is a food competitor for old-timers: carps, crucians. Unusual fish, probably, fell into a river of aquariums. But predators very heat-loving, so that our winter may not be transferred.