ST. LOUIS COUNTY, Mo. — An invasive hammerhead worm was reportedly found earlier this week at a St. Louis County Park for the first time.

A county park official says the worm was spotted in Cliff Cave Park along the Mississippi River.

These flatworms originate from Asia and can harm the local ecosystem by preying on native earthworms, which are essential for healthy soil.

They are usually seen after heavy rains, hiding under logs, rocks and leaf litter, according to St. Louis County Parks and Recreation.

Hammerhead worms can also release toxins that irritate skin and can make people and pets ill if eaten. Avoid cutting them, as they can regenerate.

To safely euthanize a hammerhead worm, officials say to place it in a sealed bag, using gloves or a shovel. Add vinegar, rubbing alcohol, salt or soap water to the sealed bag or place it in the freezer for 48 hours.

Then, dispose of the bag in the trash.