Myxiniformes is a scientific name for a group of vertebrates commonly referred to as hagfishes. These primitive marine creatures lack a true backbone and are known for their slippery and slimy appearance. However, there are several other terms that can be used as synonyms for Myxiniformes. These include Agnatha, which is used to describe jawless fish, and Cyclostomata, which is a term that encompasses both hagfishes and lampreys. Another synonym is Hyperotreti, which describes a sub-class of fish that lack vertebrae and are typically found in deep sea environments. Regardless of the term used, these unique animals provide an interesting example of evolution and adaptation.