A tidal pool is a pool of water remaining after the tide has gone back out. It is also referred to as a tide pool or a rock pool. They can be small and shallow or large and deep. The small ones are generally found far back on the seashore, and the larger ones are closer to the sea. Tide pools are formed when a high tide comes in over a rocky seashore. Water fills depressions in the ground, which get converted into secluded pools as the tide retreats. This procedure, recurring twice a day, refills the seawater in what otherwise might become a stagnant pool.
The area that is covered by a high tide and uncovered by a low tide is described as an inter-tidal zone, or foreshore. This area is often further separated into different zones according to the life forms that live there.
Organisms residing in tidal pools must be well adapted to adjust to the radical variations in conditions that come with the changing of tides every day. They must be adapted for both wet and dry conditions. Usual inhabitants of tidal pools include sea anemones, barnacles, crabs, isopods, limpets, mussels, sea stars, snails, and whelks.
The tides carry fresh oxygen and food to the pools two times a day. Between tides, some of the small-sized pools become warm and start to dry up. In such situations, the animals hide under rocks and seaweed. Sessile creatures, such as barnacles and sea anemones, are able to seal themselves off, or retract their appendages, in order to save water while exposed to air. Some deeper pools do not dry out totally between tides and can harbor small fish.
It is recommended not to disturb animals in a tide pool, as it can be hazardous to them. Even seaweed, if moved, can expose tiny creatures underneath that can die in the direct sun.
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