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A jellyfish with
human-like eyes? Photo: http://tinyurl.com/34dwxw Article: http://www.msnbc.msn.com/id/17913669/ - - - Excerpts: Jellyfish have human-like eyes One set of eyes on box jellyfish detect color and size of objects A set of special eyes, similar to our own, keeps venomous box jellyfish from bump- ing into obstacles as they swim across the ocean floor, a new study finds. Unlike normal jellyfish, which drift in the ocean current, box jellyfish are active swimmers that can rapidly make 180- degree turns and deftly dart between objects. ... Whereas we have one set of multi-pur- pose eyes that sense color, size, shape and light intensity, box jellyfish have four different types of special-purpose eyes. The most primitive set detects only light levels, but one set of eyes is more sophisticated and can detect the color and size of objects. ... Because jellyfish belong to one of the first groups of animals to evolve eyes (the phylum Cnidaria), Garm said, under- standing how their eyes operate will show scientists what eyes were like early in evolutionary time. - - - end excerpts - - -
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