Ocher Sea Stars, WashingtonHere’s one from the archives. I visited Olympic National Park back in 2009 and spent a bit of time photographing ochre sea stars (Pisaster ochraceus). They are found up and down the Pacific coast, easily recognized by their orange, purple, or reddish hues. They play a crucial role as a “keystone species,” especially in rocky intertidal zones, by preying on mussels and helping maintain biodiversity. They can regenerate lost arms, and they feed by turning their stomachs outside their bodies to digest prey. They are also surprisingly strong for their size, and cling tightly to rocks with hundreds of tiny tube feet as waves crash over them. Nikon D700 with Nikkor 17-35mm lens (at 17mm) ISO 400, f/20 at 6 seconds.