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Box jellyfish larva stage (planula) (Carybdea alata)

Image Number: 24355F

Caption:

Larva stage (planula) of a 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.

Keywords:

| 07.01.06 24355F box jellyfish Carybdea alata cnidarian coelenterate invertebrate invertebrates jelly fish larvae marine misc. invertebrates plankton planulae polyp salt water saltwater sea water seawater SEM zooplankton |

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