Final answer:
Some organisms use adaptations, such as swim bladders, to stay suspended in water.
Step-by-step explanation:
Some organisms use adaptations to stay suspended in water. Examples of this include storing oils or fats, utilizing gases, or having swim bladders.
For example, many fish have a swim bladder, which is a balloon-like internal organ filled with gas. By changing the amount of gas in the swim bladder, a fish can control its buoyancy and move up or down in the water column.
Other organisms, such as marine iguanas, have physiological adaptations to retain water and release solutes into the environment to maintain solute concentrations within an acceptable range while swimming in the ocean.