The 12 Most Aggressive Freshwater Fish That Have Invaded U.S. Waterways
Some of the most dangerous invaders in America don’t walk—they swim. These underwater troublemakers don’t care about borders, balance, or biodiversity. They charge in, throw off the food chain, bully the locals, and multiply like it’s their full-time job. Native fish? Outcompeted. Habitats? Wrecked. Conservation efforts? Spinning their wheels trying to keep up. These freshwater …