Clupea Harengus Harengus is a scientific name for the common herring. This fish is widely popular for its mild flavor and versatility in cooking. There are several synonyms for this species of fish, including Atlantic herring, Baltic herring, and North Sea herring. Some other common names for these fish include sardine, sprat, and pilchard. Herring is a vital part of many traditional dishes in various cultures around the world, from Scandinavia to Japan. This oily fish is also an excellent source of omega-3 fatty acids and other essential nutrients, making it a nutritious addition to any diet.