Most of the large, often colorful, and conspicuous jellyfish found in coastal waters throughout the world are Scyphozoa. [4] They typically range from 2 to 40 cm (1 to 15 + 1 ⁄ 2 in) in diameter, but the largest species, Cyanea capillata can reach 2 metres (6 ft 7 in) across.

2024年11月23日 · Class Scyphozoa, an exclusively marine class of animals with about 200 known species, includes all the jellies. The defining characteristic of this class is that the medusa is the prominent stage in the life cycle, although there is a polyp stage present.

Scypho­zoans live in all oceans, from the Arc­tic to trop­i­cal wa­ters. Some in­habit the deep sea, but most live near the coastal wa­ters. Most are motile an­i­mals, but mem­bers of the order Stau­rome­dusae are ses­sile. Scypho­zoans ex­hibit the main char­ac­ter­is­tics of cnidar­i­ans.

Jellyfish use both asexual and sexual reproduction. Asexual (ay-SEK-shuh-wuhl) means without, while sexual means with the uniting of egg and sperm for the transfer of DNA from two parents. The bottom-dwelling forms of some jellyfish reproduce asexually by …

The class Scyphozoa includes four orders, 20 families, 66 genera, and about 200 species. The four orders are Stauromedusae, the stalked jellyfish; Coronatae, the crown or grooved jellyfish; Semaeostomeae; and Rhizostomeae.

Scyphozoans include most of the jellyfish familiar to beach-goers; other similar organisms are classified in the Hydrozoa and Cubozoa, two other groups of cnidarians. True jellyfish are graceful, and sometimes deadly creatures. Their stings may cause skin rashes, muscle cramps, or …

2018年2月14日 · Scyphozoan jellyfish, or scyphomedusae, are conspicuous members of many ocean ecosystems, and have large impacts on human health and industry. Most scyphomedusae are the final stage in a complex life cycle that also includes two intermediate stages: the larval planula and benthic polyp.

2024年2月27日 · Scyphozoans – This class contains the larger jellyfish varieties that are more familiar to beachgoers, like the moon jellyfish (Aurelia). With rounded bells and long dangling oral arms and tentacles, scyphozoan jellyfish resemble …

2011年1月3日 · Although the scyphozoan jellyfish are typically regarded as simple animals, they accomplish the same feats as many more complex animals enabling them to survive, grow, and reproduce.

The Scyphozoa or "true jellyfish" is a group class within the phylum Cnidaria. There are about 175 species worldwide. Most Scyphozoans are free-swimming marine animals living in the open ocean, however some small species are planktonic, and a few species that are filter feeders, using the tentacles to strain plankton from the water live ...