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Daphnia ephippia and Anabaena floating nearshore
Ephippia (diapausing eggs) of Daphnia (brown) and the cyanobacterium Anabaena (bluish green) both floating on the water surface of Lake Faxon, Washington State, U.S.A., after being blown nearshore. Photo from old ASLO slide collection; taken by M. Brenner; scanned by K.L. Schulz.