Written by MD Hughes.
The Tide Recedes
The tide recedes, but leaves behind
Bright seashells on the sand.
The sun goes down, but gentle warmth
Still lingers on the land.
The music stops, and yet it lingers
On in sweet refrain.
For every joy that passes
Something beautiful remains.
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Tide pools are formed in rocky coastal areas when depressions or crevices in the rocks fill with seawater during high tide, trapping marine organisms inside when the tide recedes. Over time, wave action and erosion can also create and shape tide pools along the coast.
Some examples of islands in the Philippines that disappear during high tide are the Naked Island in Siargao and the Guyam Island in Surigao del Norte. These islands are submerged underwater due to the rising tide, but reappear as the tide recedes.
There are typically two low tides and two high tides each day. This pattern follows a semi-diurnal tide cycle, which occurs every 24 hours and 50 minutes.
The water level along the coast is higher during high tide and lower during low tide. High tide occurs when the gravitational forces of the sun and the moon align, causing water to rise and cover more of the shore. During low tide, the water recedes as the gravitational forces change, revealing more of the beach or seabed.
During high tide, hermit crabs typically retreat into their shells and seek shelter to avoid being washed away by the incoming water. They may remain hidden in burrows, under rocks, or in crevices until the tide recedes and it is safer for them to move around again.