Found lurking in Ohio’s rivers and streams, this salamander can grow to nearly two feet long. But despite its name and size, this endangered species is harmless.

Yes, hellbenders are real. And now the Ohio Department of Natural Resources has immortalized them on a T-shirt.

Here’s everything you need to know.

Ohio Department of Natural Resources uses hellbenders on 75th anniversary T-shirts in homage to Hell is Real sign

In an homage to the infamous Hell is Real sign on Interstate 71 between Cincinnati and Columbus, ODNR is using the slogan “Hellbenders are Real” (complete with an H that’s a different color from the rest of the letters, just like the sign) on one of its five 75th anniversary T-shirts. Other T-shirts read “Take a Hike,” “Let it Grow,” “Wild for Wildflowers” and “Ohio’s for the Birds.”

Sadly, the hellbenders T-shirt is currently out of stock. ODNR spokesperson Karina Cheung says they’ve sold out twice so far, first at the Ohio State Fair in late July and early August, and then shortly after they went live for online sales last week. However, ODNR has put in another order.

All about the hellbender salamander, an endangered species

The largest amphibian in Ohio, the eastern hellbender can grow to a length of 27 inches, according to ODNR, but they are usually 11.5 to 20 inches in length. They have functional lungs, along with a single gill slit on each side of the neck.

Found mostly in southern and eastern Ohio, hellbenders prefer large, swift streams where they hide under rocks during the day. They feed on crayfish, snails, minnows, insects and worms. Because hellbenders need clean, oxygen-rich water, they can be a good indicator of water quality and overall health of the stream, according to the Ohio State University Extension.

They breed in late August or September, according to ODNR. The female lays up to 500 eggs in a nest under a large rock dug by the male. Sometimes, several females use the same nest. That nest is then guarded by the male until the young hellbenders hatch in two to three months. They keep their gills until they’re about a year and a half old.

Columbus Zoo and Aquarium helping to repopulate the hellbender

Sept. 20, 2023, was a red-letter day for Greg Lipps, amphibian and reptile conservation coordinator for The Ohio State University. That was the day he and his team discovered a hellbender raised at the Columbus Zoo and Aquarium and released in 2016, guarding a nest of eggs, Lipps wrote for the zoo.

“This was, of course, exactly what we had always hoped to see: an animal born and raised at a zoo, released back into the wild, going on to reproduce and help reverse the decline of this iconic species,” Lipps writes.

The hellbender in question, a male, was found two weeks earlier — on Sept. 6 — having taken up residence in a “hellbender hut,” an artificial concrete habitat in streams used by hellbenders to nest. The male was collected as an egg in 2013, raised at the zoo and released into the wild as a 3-year-old, Lipps wrote.

More on the hellbender: Zoos, other officials work to keep hellbender salamander happy and healthy in Ohio

“This is the first evidence of a released hellbender reproducing in the wild,” John Navarro, program administrator for the Ohio Division of Wildlife’s Aquatic Stewardship program, told Farm and Dairy.

Hellbender eggs, collected each year, are sent to the Columbus and Toledo zoos as well as the animal husbandry program at the Penta Career Center in Perrysburg, Ohio, where they are raised until age three, Farm and Dairy reports.

More than 1,900 hellbenders raised at these facilities have been released into Ohio waterways in the past 10 years, Navarro said.