KENNESAW, Ga., Oct. 22 -- Kennesaw State University issued the following news release:

"It was a Joro spider, and I brought it around to show all the students," said Davis, a limited-term assistant professor of environmental science in KSU's College of Science and Mathematics. "They took pictures, and everybody was freaking out. But Joro spiders are shy enough that you can do that, and they won't bite you."

A nationally renowned expert and myth-buster on Joro spiders, Davis seeks to expand knowledge on the invasive arachnids. Joro spiders came to the U.S. via East Asia in the mid-2010s, possibly in egg sacs attached to shipping containers, and their population has only increased since then.

The spiders can grow to the size of a human pal...