Final answer:
Salmon have traits that earthworms don't, such as the ability to swim and migrate, and a highly developed sense of smell. They have adapted to an aquatic environment and rely on their streamlined bodies and specialized fins to move through water efficiently. Additionally, salmon have the ability to remember and return to their birthplace to spawn.
Step-by-step explanation:
Salmon and earthworms are two very different organisms with unique traits. One major trait that salmon have and earthworms do not is the ability to swim. Salmon are fish and live in water, while earthworms are terrestrial organisms and do not have the ability to swim. This is because salmon have adapted to an aquatic environment, with streamlined bodies and specialized fins that allow them to move through water efficiently.
Another trait that salmon have is the ability to migrate. Salmon go through different stages in their life cycle, starting as eggs, then hatching into larva, and eventually growing into adults. Adult salmon then migrate from the ocean back to the rivers where they were born to spawn and lay their eggs. This migration behavior is essential for the survival and reproduction of salmon.
Finally, salmon have a highly developed sense of smell, which helps them remember where to return to spawn. When they are born in rivers, salmon imprint on the specific scent of their natal stream. This imprinting helps guide them back to their birthplace when it's time to reproduce. Earthworms, on the other hand, do not have this ability to remember specific locations or migrate in the same way as salmon.