Search results
Results From The WOW.Com Content Network
Most of the large, often colorful, and conspicuous jellyfish found in coastal waters throughout the world are Scyphozoa. [4] They typically range from 2 to 40 cm (1 to 15 + 1 ⁄ 2 in) in diameter, but the largest species, Cyanea capillata can reach 2 metres (6 ft 7 in) across. Scyphomedusae are found throughout the world's oceans, from the ...
A scale illustration of an Irukandji jellyfish and its tentacles.Below the jelly's medusa bell are two polyp forms of the species.. Irukandji jellyfish are very small, with a bell about 5 millimetres (0.20 in) to 25 millimetres (0.98 in) wide and four long tentacles, which range in length from just a few centimetres up to 1 metre (3.3 ft) in length.
An unusual species, ... [145] [146] Most jellyfish stings are not deadly, but stings of some box jellyfish (Irukandji jellyfish), such as the sea wasp, can be deadly.
Aglantha digitale is unique among known jellyfish [4] in having giant axons in the subumbrella (the concave inner surface of the bell) which are involved in a rapid escape response. [5] Normally the hydrozoan swims by slowly pulsating its bell, movements produced by muscle contractions which eject water through the velar opening.
Malo kingi or the common kingslayer is a species of Irukandji jellyfish.It was first described to science in 2007, and is one of four species in the genus Malo. [1] It has one of the world's most potent venoms, even though it is no bigger than a human thumbnail. [2]
Whereas some other jellyfish have simple pigment-cup ocelli, box jellyfish are unique in the possession of true eyes, complete with retinas, corneas and lenses. [13] Their eyes are set in clusters at the ends of sensory structures called rhopalia which are connected to their ring nerve. Each rhopalium contains two image-forming lens eyes.
The jellyfish measure about 8 inches (20 centimeters) in length. A rock slab shows one large (right) and one small (left) bell-shaped jellyfish with tentacles. The smaller animal is rotated 180 ...
Stauromedusae are the stalked jellyfishes.They are the sole living members of the class Staurozoa and belong to the medusozoa subphylum of Cnidaria.They are unique among medusa jellyfish in that they do not have an alternation of polyp and medusa life cycle phases, but are instead interpreted as an attached medusa stage, with a lifestyle more resembling that of polypoid forms.