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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.
Every morning, jellyfish swim towards the surface of the water to reach the sunlight. Not only do they love sunlight, but they need it to survive. They feed off the algae that grows in the lake
Scyphozoa is the group commonly known as "true jellyfish" and occur in tropical, temperate and polar seas worldwide. Scyphozoans generally have planula larvae that develop into sessile polyps. These reproduce asexually, producing similar polyps by budding, and then either transform into medusae, or repeatedly bud medusae from their upper ...
Upon reaching adult size, jellyfish spawn regularly if there is a sufficient supply of food. In most species, spawning is controlled by light, with all individuals spawning at about the same time of day; in many instances this is at dawn or dusk. [66] Jellyfish are usually either male or female (with occasional hermaphrodites).
The oceans are home to many fascinating and dazzling creatures, and recently NOAA explorers captured a mesmerizing video of one of them. Bizarre looking jellyfish captured on video during deep sea ...
Chrysaora fuscescens swim using jet propulsion by squeezing their bell and pushing water behind them, allowing them to swim against currents, although most of the time they prefer to simply float. Sometimes they pick up hitchhikers, including small fish and crabs, which hide inside the sea nettle's bell and may feed on it.
The helmet jellyfish (Periphylla periphylla), sometimes called the merchant-cap, [1] is a luminescent, red-colored jellyfish of the deep sea, belonging to the order Coronatae of the phylum Cnidaria. It is the only species in the monotypic genus Periphylla and is one of the rare examples in Scyphozoa which life-cycle lacks a polyp stage.
A sea of ramen-like jellyfish took over a beach in Florida this week, and a photographer used her drone to catch the sight on video. Amber Fletcher had recently arrived home from taking photos of ...