Just days after viral video showed a man leaving shrimp on a Red Line seat, new video captured a crab taking a trip on the city’s transit system.

The footage was captured by Ryder Kennedy, who said he spotted the unusual animal while taking a CTA Red Line train towards Howard. It was later shared by the popular account Secret Chicago.

“Just a casual day on the CTA,” the caption for the video read.

What exactly happened to the crab after the video remains unclear. The CTA declined to comment on the video.

It would appear openly carrying a crab onto a CTA train does, however, violate the agency’s code of conduct.