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Aequorea victoria, also sometimes called the crystal jelly, is a bioluminescent hydrozoan jellyfish, or hydromedusa, that is found off the west coast of North America.. The species is best known as the source of aequorin (a photoprotein), and green fluorescent protein (GFP); two proteins involved in bioluminescence.
A jellyfish bloom is defined as a substantial increase in a jellyfish population within a short time period; the result of a higher reproduction rate. [2] Since jellyfish naturally have high reproductive rates, high-density blooms can occur as a result of both behavioral and ecological causes.
Hydromedusan jellyfish differ from scyphozoan jellyfish because they have a muscular, shelf-like structure called a velum on the ventral surface, attached to the bell margin. Originally from the Yangtze basin in China, C. sowerbii is an introduced species now found throughout the world in bodies of fresh water.
Unlike the hydrozoan jellyfish, Hydromedusae, Scyphomedusae lack a vellum, which is a circular membrane beneath the umbrella that helps propel the (usually smaller) Hydromedusae through the water. However, a ring of muscle fibres is present within the mesoglea around the rim of the dome, and the jellyfish swims by alternately contracting and ...
This species of jellyfish is known to live in the Pelagic zone of the ocean in the Indo-West Pacific, Eastern Atlantic and the Red Sea. They live and thrive in cold water and can be found as deep as over 3,000 feet below the surface. The species is bioluminescent. During the day it tends to remain in deeper waters, migrating to surface waters ...
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 .
When seen from below by a predator, the bioluminescence helps to match the squid's brightness and color to the sea surface above. Further information: Counterillumination In many animals of the deep sea, including several squid species, bacterial bioluminescence is used for camouflage by counterillumination , in which the animal matches the ...
Aurelia aurita (also called the common jellyfish, moon jellyfish, moon jelly or saucer jelly) is a species of the family Ulmaridae. [ 1 ] [ 2 ] All species in the genus are very similar, and it is difficult to identify Aurelia medusae without genetic sampling; [ 3 ] most of what follows applies equally to all species of the genus.