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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 bell's pliant tissue allows for the jellyfish to stretch 4 to 5 times its size, presumably to engulf their prey. Their four arms have a "paddle-like" or "kite-like" shape and can grow up to 10 m (33 ft) in length. The arms grow in a "V" shape transversely, [7] with a wider base and tapering towards the ends. They do not have any stinging ...
The taxonomy of the Cyanea species is not fully agreed upon; some zoologists have suggested that all species within the genus should be treated as one. Two distinct taxa, however, occur together in at least the eastern North Atlantic, with the blue jellyfish (Cyanea lamarckii Péron & Lesueur, 1810) differing in color (blue, not red) and smaller size (10–20 cm [3 + 7 ⁄ 8 – 7 + 7 ⁄ 8 ...
Depending on species, a fully grown box jellyfish can measure up to 20 cm (8 in) along each box side (30 cm or 12 in in diameter), and the tentacles can grow up to 3 m (10 ft) in length. Its weight can reach 2 kg (4 + 1 ⁄ 2 lb). [19] However, the thumbnail-sized Irukandji is a box jellyfish, and lethal despite its small size. There are about ...
The cannonball jellyfish (Stomolophus meleagris), also known as the cabbagehead jellyfish, is a species of jellyfish in the family Stomolophidae. Its common name derives from its similarity to a cannonball in shape and size. Its dome-shaped bell can reach 25 cm (10 in) in diameter. The rim is often colored with brown pigment.
The Linuche aquila is a very small jellyfish with a flat-topped bell separated from the vertical sides by a coronal groove. It can grow to a diameter of 16 mm (0.63 in) and a height of 13 mm (0.51 in).
Helmet jellyfish feeding on an armhook squid underwater. Helmet jellyfish reach a body size of up to 30 cm (12 in). The average wet weight of the jellyfish is 540 grams. [2] Overall, helmet jellyfish have a uniform size. [3] They consist 90% of water, the rest being tissue and gelatinous mass, which give the animals their form.
This jellyfish also lives in a symbiotic relationship with photosynthetic dinoflagellate algae, ... Size. This jellyfish can measure a maximum of 30.0 cm wide.