Complex sentence: The Orangutan crab, a member of the family Majidae, the spider or decorator crabs, has been observed in tropical waters of the Western Pacific Ocean from Indonesia to Fiji, as well as in coastal waters of Japan.
Split into simpler sentences: The Orangutan crab, is a member of the family Majidae, the spider or decorator crabs. It has been observed in tropical waters of the Western Pacific Ocean from Indonesia to Fiji, as well as in coastal waters of Japan.