Suborder Myxinoidei, also known as hagfish, is a family of jawless fish that are often referred to as "slime eels" due to their ability to produce copious amounts of slime from their skin. Synonyms for this suborder include the names Myxiniformes, Myxinidae, and Agnatha. These animals are known for their unique and ancient characteristics, such as having a skull but no vertebral column, and having a rasping tongue to eat their prey. There are over 70 species of hagfish found in oceans around the world, and they play an important ecological role as scavengers and detritivores in deep-sea ecosystems.