marine Organism’s Survival Techniques


Animals and Plants use a wide variety of techniques to survive in the marine system.

        They can resist PHYSICAL STRESS from drying, waves or currents by:

                Attaching to something that doesn’t move  (e.g. barnacles, seaweed)       

                Covered within a protective shell  (e.g. barnacles, clams)

                Burrowing under the surface of the substrate  (e.g. worms, clams)

                Hiding under rocks or vegetation  (e.g. crabs, fish)

                Moving into deep water as the tide level drops (e.g. crabs, fish)

        They can ensure access to food or sunlight by:

                Attaching to non-moving surface within the sunlight zone  (e.g. seaweed)

                Moving with currents and rapid breeding (e.g. phytoplankton)

                Living among their food items  (e.g. snails, worms, zooplankton)

                Moving about to hunt for food  (e.g. worms, crabs, fish, birds, seals)

                Lying in ambush to attack prey  (e.g. fish, worms)

                Staying in one place to filter out or snare food  (e.g. anemones, clams)

        They can act to prevent others from eating them by:

                Hiding under things or using camouflage (e.g. fish, clams, crabs)

                Using weapons like spines, claws, pinchers, stinging cells or chemicals

                    (e.g. urchins, crabs, sea stars, anemones, seaweeds)                           

                Using armor such as a shell (e.g. snail, clam, barnacle)

                Escape  (e.g. some clams, crabs, shrimp, fish)