As a result, many grazers are also found here. Large anemones, seastars, sponges, flat worms, crabs and nudibranchs all make their home in the low littoral. Each tide pool is a unique environment formed in rocky depressions by the receding tide. Tide pool organisms face large and sudden changes in salinity, temperature, pH and other factors due to tidal movements. As a result, residents have many special adaptations.
Tide pools differ from each other depending on depth and height in the intertidal.
Anemones, sea urchins, barnacles, dog whelks, and sculpins create intricate interactions in these tiny, isolated micro-habitats. University of Washington Press, Seattle. 1983. Lee, R.E. Phycology 3rd Edition. The Beachcombers Guide to Seashore Life in the Pacific Northwest. Harbour Publishing, Madeira Park, B.C. 1999.