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

The invasive species, nicknamed “the thumb splitter” is also known to make a “rumbling growl sound,” officials said.

Government officials in New Zealand are investigating how an aggressive species known as the “thumb splitter” ended up in the ...

This was the second sighting of the invasive shrimp species in Tauranga. Martin and her brother spotted the shrimp on ...

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.