yellowtail

The word "yellowtail" usually refers to a fish, especially one known for its yellow tail or a related mark near the tail. It is a common name rather than a single exact species name, so the meaning can shift by region and context. In food and restaurant settings, it often means Japanese amberjack (Seriola quinqueradiata), a fish widely used in sushi and sashimi and also known in Japanese as hamachi or buri at different stages of growth. In other places, the word may refer to related fish such as California yellowtail or other amberjacks.

Because common names are flexible, "yellowtail" can cover several edible fish rather than one precise animal. That is why the word may sound very specific but still point to different species in fish markets, cookbooks, or everyday speech. The fish are often described as rich, firm, and well suited to raw or lightly cooked dishes, which helps explain why the term appears so often on menus.

Less often, especially in older or specialized writing, "yellowtail" may be used more broadly for an animal with a yellowish tail. That use is uncommon in modern everyday English, where the fish sense is by far the main one. So if you see "yellowtail" in conversation, on a menu, or in a store, it almost certainly refers to fish.