(Box jellies)

Phylum Cnidaria Class Cubozoa Number of families 2

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Gelatinous animals that possess image-forming eyes and complex behavior, including internal fertilization in at least one species; often known as "killer box jellies," although only one of the seven genera (Chironex, in the family Chirodropidae) is potentially lethal to humans

Photo: The southern sea wasp (Carybdea rastoni) can give painful stings with its tentacles. (Photo by Animals Animals ┬ęGowlett-Holmes, OSF. Reproduced by permission.)

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Essentials of Human Physiology

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