Piscifauna is a term used to describe the aquatic animal life found in water bodies such as rivers, lakes, and oceans. In scientific terms, it refers to the fish fauna that exists in these environments. However, there are several other synonyms for piscifauna that you can use to diversify your vocabulary. These include aquatic fauna, water fauna, marine life, fish biodiversity, and freshwater fauna. Each of these terms describes the same concept as piscifauna but presents it in a different way. As a writer, using synonyms creatively can add depth to your writing and make your content more engaging and informative.