Purists may argue that the term "prawn" is reserved for the shrimp's close relative, the Dublin Bay prawn. The Dublin Bay prawn resembles a shrimp, but it's distinguished by its small pincer claws (similar to those on a lobster) and a narrower body. Sometimes called Florida or Caribbean lobsterettes or French langoustines, these shellfish can be hard to find in markets. And unlike shrimp, Dublin Bay prawns are usually cooked with their heads on. The claws make quite an attractive presentation, although they're too tiny to render any meat.