Cephea cephea, sometimes called the Crown Jellyfish, (although this name is confusing as it is also used for other species) is a “true jellyfish” (Class Scyphozoa) in the small family Cephidae.It is one of three species in its genus, all found in the Indo-Pacific and East Atlantic.Cephea cephea occassionaly drifts inshore but is mostly oceanic, broadly distributed in waters from the mid-Pacific through the Indo-Pacific to the Red Sea, and in the Atlantic off West Africa.It is a large jellyfish, reaching 50-60 cm in diameter, with multiple wart-like projections on top of the central mound of its bell, which is surrounded by a moat.The thin frilled skirt around the crown is used for swimming.Its main body is blue-purple, its eight oral arms are brown and highly divided into a large, curly-looking surface area resembling a cauliflower (hence this jellyfish’s other common name, Cauliflower Jellyfish).Multiple long colorless filaments with stinging cells for capturing prey trail behind as it swims.Sugiura (1965) studied the life history of Cephea cephea in detail from planulae larvae collected from the oral system of females caught off Japan, reporting that this species reproduces frequently by budding of the scyphistome, while strobilation is monodisc, producing only one medusa from each scyphistome polyp. Cephea cephea has since been cultured from polyps to adulthood at the Monterey Bay Aquarium in California. The Cauliflower Jellyfish is targeted by the jellyfish fishing industry, especially during large blooms, and commonly and historically eaten as a delicacy or for medicinal purposes in China and Japan, along with multiple other species from its order, Rhizostomeae.There are records of sea turtles preying upon these jellyfish (e.g. Patry 2012).
A beautiful image by Yeang Ch'ng is featured in the Smithsonian’s Nature’s Best Photography exhibit online at http://www.mnh.si.edu/exhibits/ocean%20views/gallery/index.html
(Mayor 1910; Monterey Bay Aquarium 1999-2013;Omori and Kitamura 2003; Omori and Nakano 2001; Patry 2012; Sugiura 1966; Wikipedia 2013; WoRMS 2012)
Cephea cephea, also known as the crown jellyfish, or cauliflower jellyfish, is a species of jellyfish in the family Cepheidae.[1] It occurs in the tropical waters of the western Indo-Pacific to Northern Australia. The species was first described by Peter Forsskål in 1775 and originally given the name Medusa cephea. It inhabits the pelagic zone of tropical and sub-tropical waters and is most commonly found in the Indo-West Pacific, eastern Atlantic and the Red Sea. Although this species is among the most venomous jellyfish, it is not harmful to humans and is eaten as a delicacy and used for medical purposes in China and Japan. The species can achieve a diameter of up to 60 cm.
Cephea cephea is purplish-blue in color and grow to up to 60 centimeters in diameter. This species has wart-like projections and a bell shape that is associated with the given common names for the species.[2] As in other jellyfish species, the tentacles contain nematocysts that are used to stun, kill and grapple prey items.[3] Its lifespan is approximately three to six months.[4]
This species of jellyfish is known to live in the Pelagic zone of the ocean in the Indo-West Pacific, Eastern Atlantic and the Red Sea. They live and thrive in cold water and can be found as deep as over 3,000 feet below the surface. The species is bioluminescent. During the day it tends to remain in deeper waters, migrating to surface waters at night. Its prey mainly consists of algae, shrimp, plankton, invertebrate eggs and invertebrate larvae. The most common known predators of the species are sea turtles.[5]
The reproduction cycle is similar to many other jellyfish. Adults release sperm or egg into the water; fertilized eggs form planula larvae. The planula then attaches itself to a rock or similar structure that allows it to grow into a polyp. Asexual reproduction then occurs meaning the polyp essentially clones itself and develop into another stage called the ephyra. The last process is the growth and development into an adult medusa jellyfish.[6][3] Water temperature and food supply influence the efficiency of the asexual reproduction phase.[7]
Cephea cephea is known to be one of the most venomous jellyfish. Although they have large amounts of venom deadly to their prey, their stings and venom is not harmful to humans. They are actually known to be eaten by humans located mostly in Japan and China. The dish is a delicacy in the Japanese and Chinese cultures. This particular species of jellyfish is used also used for medicinal purposes for humans.[8]
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{{cite web}}: CS1 maint: multiple names: authors list (link) Cephea cephea, also known as the crown jellyfish, or cauliflower jellyfish, is a species of jellyfish in the family Cepheidae. It occurs in the tropical waters of the western Indo-Pacific to Northern Australia. The species was first described by Peter Forsskål in 1775 and originally given the name Medusa cephea. It inhabits the pelagic zone of tropical and sub-tropical waters and is most commonly found in the Indo-West Pacific, eastern Atlantic and the Red Sea. Although this species is among the most venomous jellyfish, it is not harmful to humans and is eaten as a delicacy and used for medical purposes in China and Japan. The species can achieve a diameter of up to 60 cm.
