Caption: Animated coloured scanning electron micrograph (SEM) of Nematocyst (ejected tubule) from a tentacle of the box jellyfish (Carybdea alata). This box jellyfish belongs to the Cubozoa group of Cnidarians. The larval stage of Cnidarians is called the planula and it is a free swimming developmental stage. Cubozoan planulae are pear-shaped, have pigment spots that may be sensitive to light, and swim for a few days using cilia. After a planula settles, it grows into a polyp. The cubozoan polyp can crawl around and bud off more polyps. Like all cnidarians, cubozoans possess nematocysts, cells that fire a barb and transfer venom. When a nematocyst contacts something that might be prey or predator, the barb uncoils and fires from the capsule along with toxic venom.

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Keywords: 98608b, alata, alatina, alatinidae, animated, animation, aquatic, box, carybdea, carybdeida, cell, cells, cnidaria, cnidarian, coelenterate, colored, coloured, cubozoa, digital, electron, false-colored, false-coloured, fish, invertebrate, invertebrates, jelly, jellyfish, ken burns effect, marine, micrograph, nematocyst, nematocysts, plankton, planula, planulae, polyp, rostrum, salt, saltwater, scanning, sea, seawater, sem, stinging, tentacle, toxin, tubule, water, zooplankton

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Nematocyst from box jellyfish Carybdea alata, SEM

K006/9308 Rights Managed

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