BOSTON (WHDH) -- A feline is becoming a familiar face on Boston’s Red Line, but causing a little controversy at the same time.

Coco, the cat’s owner, has taken Jacoby -- named after Jacoby Ellsbury-- on the MBTA using a baby stroller for more than three years.

Jacoby’s fellow commuters don’t think he should be taking up space on their crowded train, so they took their arguments to Twitter. The real-life cat fight happened at South Station during rush hour.

Coco said she was shocked because Jacoby had never gotten that kind of reaction before.

“I guess the train was just extra packed on Tuesday, maybe because of the hurricane on Monday, I’m not really sure. But I had no idea people were upset. The one person I talked to who was upset was allergic to cats,” said Coco.

“I don’t think it’s a big deal. I like to look at cute things during my commute,” said one commuter.

“You bring a baby on the T in a stroller, what’s the difference for a cat?” said another commuter.

On Thursday people didn’t seem to mind as much, commuters just stopped to stare and then pet Jacoby.