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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. [3] Scyphozoans have existed from the earliest Cambrian to the ...
Catostylidae is a family of jellyfish, their common name is fat-armed jellies. [1] Members of this family are characterized by their thick, sausage-like oral arms. [2] Members of the family Catostylidae are small marine jellyfish with domed bells. The eight short oral arms are broad and three-sided.
Catostylus tagi is a species of jellyfish from warmer parts of the East Atlantic Ocean and since the 2000s also found in the Mediterranean Sea. [1] [2] It is the only member of the family Catostylidae that is found in Europe, [3] and it is a common species in the Tagus estuary in Portugal.
Some box jellyfish species' eyes appear to have evolved more focused vision in response to their habitat. [50] Pupillary contraction appears to have evolved in response to variation in the light environment across ecological niches across three species of box jellyfish (Chironex fleckeri, Chiropsella bronzie, and Carukia barnesi).
Aglantha digitale is the most common species of jellyfish found in surface waters in the Arctic and sub-Arctic. It occurs above the continental slope but is more common over the deep ocean, seldom occurring at a depth greater than 200 m (660 ft).
The Atlantic sea nettle (Chrysaora quinquecirrha), also called the East Coast sea nettle in the United States, is a species of jellyfish that inhabits the Atlantic coast of the United States. Historically it was confused with several Chrysaora species, resulting in incorrect reports of C. quinquecirrha from other parts of the Atlantic and other ...
Periphyllidae is a family of jellyfish containing four genera and six species. [1] The most well-known member of the family, Periphylla periphylla , is usually considered a deep-sea species, but it forms large blooms in surface waters of Norwegian fjords.
Aequorea vitrina, commonly called the crystal jellyfish, crystal jelly, lampshade or disk jellyfish, [2] is a species of hydrozoan in the family Aequoreidae. [3] [4]The specific name vitrina means "glassy", due to its transparent appearance; it should not be confused with Aequorea victoria, which is also sometimes called the crystal jelly.