Like humanity in general, there is a lot of variety. My dad has been a pescetarian for 30+ years, so I'm aware of the term and use it at least two or three times a year. Personally, I'm a flexitarian and eat a reduced animal flesh diet. I know quite a few vegetarians, and they don't all eat the same diet (one does eat eggs on a weekly basis and still calls himself a vegetarian, which is somewhat controversial according to the other vegetarians that I talk to). Most vegetarians I know don't consume fish or dairy.