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These breezy April days, as the tide recedes along San Diego beaches, some beachgoers are noticing small objects left behind at the high tide line. They're the size and shape of a human ear. They're electric blue and deep purple — the same color and texture as the Portuguese man-of-war common to Florida & Hawaiian beaches.Only these less common "jellyfish" seem to lack the long, sting-inducing tentacles of their more common cousins. So swimmers who accidentally interact with them have little mor