The term fish family refers to a group of fish species that are related to each other. However, there are several synonyms that can be used instead of fish family. One of these is piscine, which refers to anything related to fish. Another synonym is ichthyic, which describes anything related to the study or science of fish. In addition, some people use the term ichthyological to describe the study of fish and fish-related topics. Also, the term aquatic life can be used to describe everything that lives in water, including fish. Lastly, the phrase aquatic fauna can be used to describe the animal life that exists in bodies of water, including fish.