Aliens Attack! Invasive Lionfish Arrive in Mediterranean

Venomous lionfish are striking to look at, with bold stripes and flowing, sail-like fins. A new study shows that the first wave of a lionfish invasion has struck in the Mediterranean Sea, a region where these fish had not been established before. As ocean temperatures warm, numerous non-native fish have invaded Mediterranean waters — about 130 species since 2001, according to the study authors.