Literally my father invited a vegetarian friend to his house and said upon his arrival "I know you don't eat meat, so I got you a chicken."
As a vegetarian, I will never understand how some people don't classify chicken as meat. I can almost understand the fish thing because pescatarians are often misidentified as vegetarians, but a chicken. That's clearly and obviously meat. I'm always polite when these misunderstandings come up, but I'd love to ask them what sort of plant did they pluck that chicken off of.
You don't pluck a fish off a plant either so I wonder why you feel particularly hot and bothered about that particular bit.
Bolded for emphasis. Pescatarians regularly get misidentified as vegetarians. Hell they sometimes misidentify themselves as vegetarians. So I can see how people could have the misconception that vegetarians eat fish. The same does not hold true for chicken.
Regularly though? Besides Ron Swanson on Parks and Rec no one regards fish as being a vegetable, which is in the name of vegetarian.
It's probably question three that gets asked when the average person finds out I'm a vegetarian. So very regularly. It's not that people think that fish are vegetables, it's that they think that vegetarians still eat fish despite that fact because, as I've mentioned, Pescatarians are frequently misidentified as vegetarians.
Huh. That's indeed surprising, but okay fair enough. ---