A Russian magazine editor claims his publisher demanded he censor a book that mentions homosexuality in animals because it violates the country’s “LGBT propaganda” law.

Viktor Kovylin, editor of the scientific journal Batrachospermum, wrote on Telegram that his publisher told him the descriptions of same-sex behavior in a book on animal sexual behavior were against the law because they did not express “disgust or criticism” for the acts.

“Apparently, neutral scientific descriptions of homosexual behavior, without disgust or criticism, now fall under the category of propaganda for non-traditional relationships!” Kovylin wrote on Telegram, according to a translation.