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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 ]
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 ]
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 Irukandji jellyfish (/ ɪr ə ˈ k æ n dʒ i / irr-ə-KAN-jee) are any of several similar, extremely venomous species of rare box jellyfish. With a very small adult size of about a cubic centimetre (1 cm 3 or 0.061 in 3 ), they are both one of the smallest and one of the most venomous jellyfish in the world.
The medusa is box-shaped and has a maximum height of about 110 millimetres (4.3 in) which is only about one half to one third the size of Chironex fleckeri. On average, however, the animals are much smaller, being more typically 60 millimetres (2.4 in) in height. The maximum inter-radial diameter is 95 millimetres (3.7 in).
Box jellyfish have 24 eyes that are categorized into four morphological types. These four types are made up of two pigment cup eyes and two lens eyes that enhance the jellyfish’s ability to navigate their environment and detect prey or predators. [ 8 ]
Chirodectes illustration of Chirodectes maculatus Scientific classification Domain: Eukaryota Kingdom: Animalia Phylum: Cnidaria Class: Cubozoa Order: Chirodropida Family: Chirodropidae Genus: Chirodectes Gershwin, 2006 Type species Chirodectes maculatus (Cornelius, Fenner & Hore, 2005) Chirodectes is a very rare, monospecific genus of box jellyfish in the family Chirodropidae. The first and ...
Chironex is a genus of box jellyfish in the family Chirodropidae. Their stings are highly venomous , and have caused human fatalities. Based on present knowledge, the genus is restricted to the central Indo-Pacific , ranging from southern Japan to northern Australia.