Coraholmen is an island in Ekmanfjorden in James I Land at Spitsbergen, Svalbard, at the northern side of Isfjorden. It has a length of 3.3 kilometers, and a width of 1.8 kilometers. The island is named after the fossil species Productus cora, which is common on the island.[1] [2] Part of the island is dominated by moraine ridges deposited by the glacier Sefströmbreen during a surge in 1896. Coraholmen is included in the Nordre Isfjorden National Park.[3]