Upside down jellyfish (Cassiopeia xamachana) are another member of the order Rhizostomae. The species name, xamachana, means Jamaican although their natural habitat is in no way exclusive to Jamaican waters. Populations exist throughout the Gulf of Mexico andCaribbean as well as along the coats of Florida. They are also present half way across the globe in the Pacific Ocean. Although not native to these waters, upside down jellyfish were introduced to the Hawaiian Islands during World War II most probably from jellyfish polyps attaching themselves to the underbellies of war ships coming back from the Philippines.
This species is prevalent in shallow, warm tropical waters such as mangrove swamps. They are often called mangrove jellyfish because they are frequently found in large aggregations in these swampy regions. Unlike many species of jellyfish, upside down jellies are completely marine. None have been found in brackish or fresh waters. Continue reading “Pet Jellyfish Facts: Upside Down Jellyfish (Cassiopeia Xamachana)”