Final answer:
Organisms in the intertidal zone, such as barnacles, halophytes, mussels, and clams, have developed specialized adaptations like cement-like anchoring, salt filtration, and switching between respiration types to survive the rigorous environmental conditions.
Step-by-step explanation:
An example of an adaptation found in an organism living among the tides in the intertidal zone is the ability of barnacles to secrete a cement-like substance that anchors them firmly to rocks. The intertidal zone presents extreme environmental challenges such as varying salinity levels, temperature changes, and wave action. To survive in this zone between high and low tide, organisms must display remarkable adaptations. Halophytes, for instance, have specialized adaptations to cope with salty conditions; they may have filters in their roots to remove salt or mechanisms to pump oxygen into their roots. Animals like mussels and clams exhibit behavioral adaptations, such as closing their shells and switching to anaerobic respiration when salinity drops, and then reopening and resuming aerobic respiration when conditions improve. Crustaceans such as the shore crab have tough exoskeletons which protect them from desiccation and damage caused by waves.