Tarantulas shed their itchy butt hair when stressed.

On Thursday (Aug. 6), entomologist Gwen Pearson tweeted a photo of what that looks like.

"Itchy butt hair is the primary defense for South American tarantulas, not biting," Pearson told Live Science in an email.

"And it's SUPER itchy — — worse than fiberglass.

Removing spiders from the wild also stresses the environment, Pearson added, and has been linked to species decline — partly because it takes the arachnids so long to mature.

Despite this, tarantulas are one of the most trafficked animals in the world, Kelli Walker, senior keeper at the Cincinnati Zoo and Botanical Garden in Ohio told the Cincinnati Enquirer.

And luckily, Lil' Kim can count on her butt hairs to grow back soon — however, she'll have to grow a whole new layer of skin in the process, Pearson said.

"The only way [tarantulas] can replace the 'hair' is to completely replace their entire exoskeleton," Pearson explained.

It might take the arachnid a little extra time to settle into her new habitat at the zoo before she can start molting, Pearson said, but Kim's butt may be gloriously hirsute again by Thanksgiving