Tide pool

A tide pool or rock pool is a shallow pool of seawater that forms on the rocky intertidal shore. These pools typically range from a few inches to a few feet deep and a few feet across. Many of these pools exist as separate bodies of water only at low tide, as seawater gets trapped when the tide recedes. Tides are caused by the gravitational pull of the sun and moon. A tidal cycle is usually about 25 hours and consists of one or two high tides and two low tides. Tide pool habitats are home to especially adaptable animals, like snails, barnacles, mussels, anemones, urchins, sea stars, crustaceans, seaweed, and small fish. Inhabitants must be able to cope with constantly changing water levels, water temperatures, salinity, and oxygen content. At low tide, there is the risk of predators like seabirds. These pools have engaged the attention of naturalists and marine biologists, as well as philosophical essayists: John Steinbeck wrote in The Log from the Sea of Cortez, "It is advisable to look from the tide pool to the stars and then back to the tide pool." Intertidal zone The rocky shoreline exhibits distinct zones with unique characteristics. These zones are created by the tidal movements of water along the rocky shores from high to low-tide. They are: The supralittoral zone or splash zone: area above the high-tide mark, which is virtually a terrestrial environment. Occasionally gets splashed, but never gets covered by the ocean. The intertidal fringe: area around the high-tide mark. The intertidal or littoral zone: area between the high and low-tide marks. Can be further divided into high, mid, and low intertidal zones, which are explained below in more depth. The sublittoral or subtidal zone: area below the low-tide mark. The presence and abundance of flora and fauna vary between zones along the rocky shore. This is due to niche adaptations in response to the varying tides and solar exposure. Tide pools exist in the intertidal zone (the area within the tidal range), which is submerged by the sea at high tides and during storms.