Fig. 16: Barnacles on a rock during low tide. These small crustaceans cling to a rock and use their fan-like claws to row plankton into their mouths when the tide is in. — Nikon D70, AF Nikkor Micro 105mm 1:2.8, Tarifa, Spain, May 2005 Nikon D70; Δt=1/400 s; f=105 mm; f/11.0; 5 May 2005 17:31:12