Skipjacks are a type of small, fast-sailing boat that is traditionally used for fishing. They are also known as tunas, which is a five-letter word that can be used to solve the crossword puzzle. Skipjacks are characterized by their sharp bow and stern, and their shallow draft, which allows them to navigate in shallow waters. They are typically rigged with two or three sails and have a single mast. Skipjacks are popular among recreational sailors due to their maneuverability and speed.