Marine pumps circulate, remove, and deliver fresh and salt water. Marine straight centrifugal pumps have an intake connection in-line with the impeller's eye and shaft. Marine submersible centrifugal pumps transfer or recirculate liquid and work fully immersed in the liquid. Marine utility pumps are used for a variety of water removal and washdown applications. Bait and live well pumps circulate new fresh or salt water to live bait and caught-fish holding tanks. Marine bilge pumps install at the lowest point in the boat to drain unwanted water.