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The Scyphozoa are an exclusively marine class of the phylum Cnidaria, [2] referred to as the true jellyfish (or "true jellies"). The class name Scyphozoa comes from the Greek word skyphos ( σκύφος ), denoting a kind of drinking cup and alluding to the cup shape of the organism.
Turritopsis dohrnii, also known as the immortal jellyfish, is a species of small, biologically immortal jellyfish [2] [3] found worldwide in temperate to tropic waters. It is one of the few known cases of animals capable of reverting completely to a sexually immature, colonial stage after having reached sexual maturity as a solitary individual.
The thimble jellyfish (Linuche unguiculata) is a species of cnidarian found in the warm West Atlantic Ocean, including the Caribbean. [2] [3] It is a tiny jellyfish with a straight-sided, flat-topped bell. This jellyfish is the most common cause of seabather's eruption, a reaction caused by the injection of juvenile jellyfish nematocysts into ...
The lion's mane jellyfish, Cyanea capillata, was long-cited as the largest jellyfish, and arguably the longest animal in the world, with fine, thread-like tentacles that may extend up to 36.5 m (119 ft 9 in) long (though most are nowhere near that large). [54] [55] They have a moderately painful, but rarely fatal, sting. [56]
Mayo Clinic states that most jellyfish stings, unless severe symptoms are also present, can be treated by: Carefully plucking visible tentacles from the skin with fine tweezers Soaking the skin in ...
Mastigias is a genus of true jellyfish in the family Mastigiidae.It contains seven described species.Members of this genus are found widely in coastal regions of the Indo-Pacific, including saline lakes of Palau (e.g., Jellyfish Lake), but there are also records from the West Atlantic at Florida and Puerto Rico.
Cassiopea (upside-down jellyfish) is a genus of true jellyfish and members of the family Cassiopeidae. [3] They are found in warmer coastal regions around the world, including shallow mangrove swamps, mudflats, canals, and turtle grass flats in Florida , the Caribbean and Micronesia .
Once stranded on the beach, cannonball jellies can’t survive long out of water and eventually become a food source for shorebirds, crabs, sea turtles and other critters that live along the coast.