In New Zealand, government officials are looking into how a species called the "thumb splitter" wound up in the country's northern coastal waters. Researchers had been out trapping Asian paddle ...

Why the "Thumb Splitter" Is a Concern. Known for their aggression, Japanese mantis shrimp have earned their ominous nickname ...

Getty Images/iStockphoto Government officials in New Zealand are investigating how an aggressive species known as “the thumb splitter” ended up in the country’s northern coastal waters.