Scientists have discovered traces of cocaine in nearly every shrimp tested in certain regions of the U.K.

UNITED KINGDOM (WTHR) — Scientists have discovered traces of cocaine in nearly every shrimp tested in certain regions of the U.K. — and they can't figure out why.

The Environmental International Study showed samples of shrimp collected in July 2018 containing cocaine as well as pesticides.

The samples were taken from more than a dozen sites across five river catchments in the Suffolk area.

The shrimp also tested positive for lidocaine, a medication used to numb tissue in a specific area as well as fenuron, ketamine — an animal tranquilizer — and tramadol, an antidepressant.

Scientists believe that the drugs made their way into the shrimp's habitat after a possible leakage of water into the sewer.

Researchers were most shocked that these traces were discovered in more rural areas of the U.K. as opposed to London, a bigger metro area.