Based on the legend that circulated in the islands, the island of karimunjawa was discovered by Sunan Muria. The legend tells of Sunan Muria are concerned about the mischief her son, Amir Hasan. For the purpose of educating, Sunan Muria then ordered his son to go to an island that appears "kremun-kremun" (blurred) from the summit of Mount Moriah for the child can deepen and develop the science of religion. Because it appears "kremun-kremun" then called the island of Karimun Island.
Since March 15, 2001, Karimunjawa set by the government of Jepara as a National Park. Publications are home to coral reefs, mangroves, coastal forests, and nearly 400 species of marine fauna, including 242 species of ornamental fish. Some of the rare fauna that berhabitat here is the sea eagle and white chest, hawksbill and green turtles.
Plants that became the hallmark of the National Park Karimunjawa dewadaru (Crystocalyx macrophyla) contained in the lowland rain forest.
Waves at Karimunjawa is low and tame, mostly limited by the beach is fine white sand beaches.