Zoarces Viviparus is a species of eelpout, commonly known as the viviparous blenny. However, there are several alternative names for this fish that you may not be aware of. For instance, it is often referred to as the viviparous eelpout, the viviparous rockling, or simply the rock eel. Other synonyms for Zoarces Viviparus are the eelpout, the cod-eel, and the blenny; however, these names can also refer to other species of fish. Regardless of what you call it, Zoarces Viviparus is a unique and fascinating creature with an unusual reproductive system that contributes to its ecological significance.