USCGC Sundew (WLB-404) is a 180-foot (55 m) sea going buoy tender (WLB). An Iris, or C-class tender, it was built by in Duluth, Minnesota, United States. Sundew's preliminary design was completed by the United States Lighthouse Service and the final design was produced by Marine Iron and Shipbuilding Corporation in Duluth for the U.S. Coast Guard. On 29 November 1943 the keel was laid. It was launched on 8 February 1944 and commissioned on 24 August 1944. The original cost for the hull and machinery was $861,589.