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Nature 425, 360 (25 September 2003) | doi:10.1038/425360a

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Zoology: Light touch on the rudder

Tim Lincoln

The larva of the box jellyfish Tripedalia cystophora is an uncomplicated creature: it consists of only five cell types. But studies of the animal and of one cell type in particular, the light-sensitive 'ocellus', have produced an intriguing set of observations.