Tropical water fleas are native to warm, tropical waters, such as those found in Africa, Asia, and South America. However, in recent years, there have been reports of tropical water fleas invading European lakes. This is likely due to climate change, which is causing the water temperature of these lakes to rise. Tropical water fleas can survive and thrive in warmer waters, and they are also able to reproduce more quickly in these conditions. This makes them a threat to native European water flea species, which may not be able to compete with them.