<P> Pescetarianism (/ ˌpɛskəˈtɛəriənɪzəm /; also spelled pescatarianism) is the practice of following a diet that includes fish or other seafood, but not the flesh of other animals . </P> <P> Those on pescetarian or pollotarian diets may define meat only as mammalian flesh and may identify with vegetarianism . Most pescetarians maintain a lacto - ovo vegetarian diet with the addition of fish and shellfish, described as "fish but no other meat". The common use association between such diets and vegetarianism has led groups such as the Vegetarian Society to state that diets containing these ingredients are not vegetarian . </P> <P> Pescetarian or pescatarian is a neologism formed as a portmanteau of the Italian word pesce ("fish") and the English word vegetarian . The English pronunciation of both pescetarian and pescatarian is / ˌpɛskəˈtɛəriən /, with the same / sk / sound present in pescato (Italian: (peˈskaːto), derived from piscatus, the perfect passive participle of the Latin verb piscor meaning "to fish"), though not in the word pesce (Italian: (ˈpeʃʃe)). </P>

What do you call a person who only eats fish