From the Nikon competition

From the Washington Post: Participants in the 2018 Nikon Small World Photomicrography Competition know that advanced imaging and microscope technologies help to lend more clarity and reveal the unexpected beauty of the world around us. See that article or the Competition page for more and especially large format picture. The photographs look a bit like mathematical art. There is also a Small world Motion competition.
Balanus glandula , an acorn barnacle. (Charles Krebs)
Primate foveola, the central region of the retina. (Hanen Khabou/Vision Institute, Department of Therapeutics, Paris)
Daphnia, water flea, with eggs. (Anne Algar)
Chameleon embryo. (Teresa Zgoda)
The winners: