Rajidae is the scientific name for a family of fish commonly referred to as skates. However, there are several synonyms that can be used interchangeably with the term Rajidae including the Bathyrajidae family, the Riorajidae family, or the Arhynchobatidae family. In addition, skates may also be referred to as rays, although they are technically different species. Skates are known for their flat body, cartilage skeleton, and distinctive diamond-shaped tail. These fish can be found in oceans all over the world and are a vital part of the marine ecosystem. While Rajidae may be the scientific name, there are many synonyms to describe these fascinating creatures.