The genesis description of creation states that on the 5th day, G-d created all fish and sea creatures and filled the sky with all variety of birds that fly.
After this, G-d creates all the land animals and then Adam, who is given the responsibility of overseeing the whole of creation as a tender.
My question is do the sages give any insight into why G-d may have compartmentalized the animals that fly and animals that swim from land animals and animals and Adam?
From a human perspective, animals are animals. While they all have different traits and qualities, the fact that G-d created a separate day for creating those of the sea and those of the air makes me think it was meant to send a specific message regarding their natures and their qualities.
Could it be related to the fact that humans cannot fly and humans cannot breathe underwater? Essentially, God is categorizing each to a domain of their natures. Hence why humans were grouped with other land animals whom we share an equal footing with in terms of inhabiting land. That said, how could Adam have had true ability to oversea animals that fly and animals that swim if he existed in a domain separate from them?