The Atlantic Moonfish, also known as Lookdown fish, is a popular fish species found in subtropical and tropical waters along the Atlantic coast. This fish features a unique appearance with a silver body and a compressed, disc-like shape. The Atlantic Moonfish is also known by other names such as Moonfish, Diamondfish, and Silver Moonfish. Other synonyms for the fish include Hardhead, Silverfish, and Yellow Moon. Some regional names include Jack, Mummichog, and Skipjack, depending on the location. The synonymic variations highlight the wide range of names given to the Atlantic Moonfish across different regions, adding to its mystique and attraction as a popular catch for anglers and seafood lovers alike.