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The bell of the jelly blubber is spherical in shape, and its feeding structures make up a greater proportion of its body than in many other species of jellyfish. [5] Because of their unique body shape, C. mosaicus are known to utilize jet propulsion, triggered by the contracting and relaxing patterns of their bell. [5]
The middle layer is called the mesoglea; a jelly-like substance that is flexible and dense. The outermost layer is the epidermis ; it contains the nerve net. [ 4 ] There is a network of branching canals linked with the primary ring canal, but these are not joined to the gastrovascular cavity except through the sixteen or thirty two radial canals .
Polyorchis, or bell jellies, is a genus of hydrozoans in the family Corynidae. They are transparent with red coloration in their internal organs and eye spots around the rim of their bell. The red pigmentation helps them camouflage. They are often found in harbors, marinas, and other calm waters close to shore.
Max size (bell diameter) Blue Blubber Jellyfish: Catostylus mosaicus: No: Expert: This jellyfish actually ranges in color from white to dark purple to reddish brown. It has a dome-shaped bell which pulses at a quick, steady pace, making these jellyfish strong, active swimmers. 25 cm (9.8 in) Moon jellyfish: Aurelia aurita: No: Moderate to Difficult
The Deepstaria enigmatica has a wide, thin bell (up to 60 cm or 2 ft), [1] transparent in appearance, which undulates as the jellyfish moves. They are usually found in Antarctic and near-Antarctic seas, but have been spotted in waters near the United Kingdom and Gulf of Mexico, at depths of 600–1,750 metres (1,970–5,740 ft).
Although it is similar to the lion's mane jellyfish, the blue jellyfish is not as large, and has a translucent bell. [ 1 ] C. lamarckii has a blue or yellow tone and grows to approximately 10 to 20 cm (3.9 to 7.9 in) across the bell, but specimens can grow to 30 cm (12 in). [ 2 ]
The bell of large specimens may be 25mm in diameter. However, specimens with a 10mm bell is far more commonly observed. The colour varies greatly. Specimens that appear quite opaque may be orange-brown, olive-brown, red, orange, or may appear locally green. Specimens that seem more translucent may appear brown and aqua, or almost white in colour.
The medusa of Turritopsis dohrnii is bell-shaped, with a maximum diameter of about 4.5 millimetres (0.18 in) and is about as tall as it is wide. [11] [12] The mesoglea in the walls of the bell is uniformly thin, except for some thickening at the apex. The relatively large stomach is bright red and has a cruciform shape in cross section.