One of the Ocean’s Biggest Threats Is Still Mostly a Mystery

The first signs of trouble came in the mid-2000s. A strikingly beautiful, highly venomous animal called the lionfish—first spotted outside its native range in the Indo-Pacific in the 1980s—seemed to be in every reef, mangrove forest, and seagrass meadow in the Caribbean. The fish quickly became the face of what the International Union for Conservation of Nature has called “arguably the most insidious threat” to marine biodiversity: invasive species.

Read more at The Atlantic