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Chironex fleckeri is the largest of the cubozoans (collectively called box jellyfish), many of which may carry similarly toxic venom. Its bell usually reaches about 16 cm (6.3 in) in diameter but can grow up to 35 cm (14 in). [8] From each of the four corners of the bell trails a cluster of 15 tentacles. [4]
However, the thumbnail-sized Irukandji is a box jellyfish, and lethal despite its small size. There are about 15 tentacles on each corner. There are about 15 tentacles on each corner. Each tentacle has about 500,000 cnidocytes , containing nematocysts , a harpoon-shaped microscopic mechanism that injects venom into the victim. [ 20 ]
Chiropsalmus quadrumanus is a cube-shaped, colourless, transparent jellyfish with a diameter of about 14 centimetres (5.5 in) and height a little less than this. The body is composed of a gelatinous material and the top edges are rounded while the top surface is flat.
The underside of the bell is partially constricted by a velarium, [2] a horizontal ring of tissue, [3] and in the centre is a manubrium, a tube-like structure which hangs down with the mouth at its tip. [4] This box jellyfish is a translucent yellowish-brown colour. [2]
M. virulenta is one of the largest species of box jellyfish, with tentacle lengths of about three metres at maximum extension. The maximum bell height observed in M. virulenta can range up to 250 mm and the bell width can range up to 200 mm. [3] The bell of M. virulenta is rectangle-shaped and covered with nematocyst warts.
Carybdea marsupialis is a small transparent jellyfish with a box-shaped bell [2] about 3 cm (1 in) across, at the four lower corners of which are four elongated tentacles up to 30 cm (12 in) long. The bell has a number of small white or yellowish warts with stinging cells, and near the margin, equidistant from the tentacles, are four rhopalia ...
Tripedalia are relatively small in size, ranging from 11 to 15 mm. Both species have a cuboid bell and are transparent with a yellowish to brownish color. Their bells contain nematocyst warts that are mainly around the outline of T. cystophora and are thinly spread throughout T. binata.
Copula is a monotypic genus of box jellyfish in the family Tripedaliidae of the phylum Cnidaria. The only species in the genus is Copula sivickisi, a very small gelatinous, bell-shaped jellyfish with four tentacles that is active only at night. It is unusual among box jellyfish in having a mating ritual and internal fertilization.