サカサクラゲ

幅10 - 12cm。平らな傘を持つ。暖海の浅海域に生息。 刺胞で餌を捕らえたり、褐虫藻を育て、光合成させ、エネルギーを利用し、成長する。

この種は刺し傷を伴うような刺胞をもち、症状は軽度の痛み、発疹、腫れなどある。 あと、刺胞の含んだ液体を海中に放ち、近づくと刺されたり、アレルギーを起こす。

この節には参考文献や外部リンクの一覧が含まれていますが、脚注によって参照されておらず、情報源が不明瞭です。 脚注を導入して、記事の信頼性向上にご協力ください。（2023年3月）

• https://www.marinepia.or.jp/picturebook/public/detail/925?mode=taxon&contents_id=4
• Nath, Ravi D.; Bedbrook, Claire N.; Abrams, Michael J.; Basinger, Ty; Bois, Justin S.; Prober, David A.; Sternberg, Paul W.; Gradinaru, Viviana et al. (October 2017). “The Jellyfish Cassiopea Exhibits a Sleep-like State”. Current Biology 27 (19): 2984–2990.e3. doi:10.1016/j.cub.2017.08.014. 
• Keable, Stephen J.; Ahyong, Shane T. (10 May 2016). “First records of the invasive Upside-down jellyfish, Cassiopea (Cnidaria: Scyphozoa: Rhizostomeae: Cassiopeidae), from coastal lakes of New South Wales, Australia”. Records of the Australian Museum. doi:10.3853/j.2201-4349.68.2016.1656. 
• Holland, Brenden S.; Dawson, Michael N.; Crow, Gerald L.; Hofmann, Dietrich K. (November 2004). “Global phylogeography of Cassiopea (Scyphozoa: Rhizostomeae): molecular evidence for cryptic species and multiple invasions of the Hawaiian Islands”. Marine Biology 145 (6): 1119–1128. doi:10.1007/s00227-004-1409-4. 
• Weeks, Chelsea; Meagher, Shawn; Willink, Philip; McCravy, Kenneth W. (September 2019). “Does seawater acidification affect zooxanthellae density and health in the invasive upside‐down jellyfish, Cassiopea spp.?”. Invertebrate Biology 138 (3). doi:10.1111/ivb.12255. 
• Mellas, Rachel E.; McIlroy, Shelby E.; Fitt, William K.; Coffroth, Mary Alice (October 2014). “Variation in symbiont uptake in the early ontogeny of the upside-down jellyfish, Cassiopea spp.”. Journal of Experimental Marine Biology and Ecology 459: 38–44. doi:10.1016/j.jembe.2014.04.026. 
• Morandini, André C.; Stampar, Sergio N.; Maronna, Maximiliano M.; Da Silveira, Fábio L. (March 2017). “All non-indigenous species were introduced recently? The case study of Cassiopea (Cnidaria: Scyphozoa) in Brazilian waters”. Journal of the Marine Biological Association of the United Kingdom 97 (2): 321–328. doi:10.1017/s0025315416000400. hdl:11449/162535. 
• Thornhill, Daniel J.; Daniel, Michael W.; LaJeunesse, Todd C.; Schmidt, Gregory W.; Fitt, William K. (October 2006). “Natural infections of aposymbiotic Cassiopea xamachana scyphistomae from environmental pools of Symbiodinium”. Journal of Experimental Marine Biology and Ecology 338 (1): 50–56. doi:10.1016/j.jembe.2006.06.032. 
• Ohdera, Aki H.; Abrams, Michael J.; Ames, Cheryl L.; Baker, David M.; Suescún-Bolívar, Luis P.; Collins, Allen G.; Freeman, Christopher J.; Gamero-Mora, Edgar et al. (9 April 2018). “Upside-Down but Headed in the Right Direction: Review of the Highly Versatile Cassiopea xamachana System”. Frontiers in Ecology and Evolution 6: 35. doi:10.3389/fevo.2018.00035.