Doug Wechsler / Mealy bugs on Wood Nettle (Laportea canadensis) urticating hairs, Fairmount Park, Wissahickon, Philadelphia, Pennsylvania, USA, May.
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Scott Leslie / Sea Lettuce (Ulva lactuca) and small snails, Nova Scotia, Canada
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David Hall / Split-level of Cormorants (Phalacrocorax sp.) standing on rocks with Sea lettuce (Ulva sp.) seen underwater, Hussar Bay, Nigei Island, Queen Charlotte Strait, British Columbia, Canada. September.
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David Hall / Split level shot of kelp and other 'seaweeds' partly exposed at low tide, with coniferous forest in the background. Seen in this photograph are the following: Turkish washcloth (Mastocarpus pa...