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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]
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 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.
Like other jellyfish, lion's manes are capable of both sexual reproduction in the medusa stage and asexual reproduction in the polyp stage. [15] Lion's mane jellyfish have four different stages in their year-long lifespan: a larval stage, a polyp stage, an ephyrae stage, and the medusa stage. [15]
Nearly 100 Portuguese man-of-war washed up on shore Monday, according to the Hilton Head Island Beach Patrol.
The box jellyfish actively hunts its prey (small fish), rather than drifting as do true jellyfish. They are strong swimmers, capable of achieving speeds of up to 1.5 to 2 metres per second or about 4 knots (7.4 km/h; 4.6 mph). [19] and rapidly turning up to 180° in a few bell contractions. [4] Some species are capable of avoiding obstacles. [4]
There's evidence to suggest that the comb jellyfish was the first animal to appear on Earth some 700 million years ago. ‘Time-traveler’ jellyfish found to age backward in accidental discovery ...
Stygiomedusa swimming near the Melchior Islands as seen from Viking submersible "Ringo" in December 2023.. Sightings of giant phantom jellyfish in the Antarctic Ocean: Although Stygiomedusa is not native to the Antarctic Ocean, there have been sightings of the jellyfish in the Antarctic Ocean [8] with the help of submersibles.