272 KB Organisms depend on the reliability of tidal patterns . Twice each day sea water nourishes life in the intertidal areas along the coast. Intertidal organisms have evolved life-ways and physical characteristics that allow them to survive while the water retreats.
Some organisms take refuge in remnant pools .
To protect themselves from pounding waves and heat of the daily sun, others have thick shells or water-tight membranes. They may plaster themselves to rocks and wait patiently. As water returns, the intertidal life returns to their aqueous activities.