Scientists Warn That This Common Pet Fish Can Wreck Entire Ecosystems

Researchers found that released pet goldfish can seriously damage freshwater ecosystems.

In controlled lake-like experiments, goldfish worsened water quality and reduced invertebrates and native fish health.

The study suggests goldfish can drive long-lasting food-web changes and even push ecosystems into a degraded state.

The findings strengthen evidence that a common pet can become a serious invasive species, underscoring the need for better prevention and management.