In Genesis 1 nothing is mentioned of God creating anything too small for the human eye to see. In Genesis 2 Adam named all the animals God created, but for Adam to have named something he must have been able to see it.
Therefore plankton, if it exists, could not have been created by God or named by Adam. However, everything which exists must have been created by God. Therefore plankton does not exist.
Plankton is an atheist myth designed to conceal the fact that there is no natural explanation for the sustenance of whales. Whales live directly on God's miraculous power, as shown by the fact that the whale did not starve even though Jonah was in his stomach, and yet Jonah was not digested by the whale so that Jonah could not have been the source of its sustenance.
However, atheists cannot believe that God sustains whales, so they dreamt up plankton to push God out of the picture. Remember, you have never seen plankton with your naked eye before, and you can't actually touch what you see under the microscope so you don't know that it's an illusion. Therefore there is no evidence that plankton exist, and this shows that plankton-o-belief is a religious belief among atheists, not a scientific belief.
=========
Parodies aside, I have actually seen quite a few commentators on my E-Sword notes explain the lion and lamb as figurative. According to them, this reflects how the grace of God operating in the Messianic Kingdom will so subdue those with the temperaments of lions, that those who would ordinarily be victimized by them as lambs will miraculously feel safe enough to even lie down with them. In modern terms, the tax collector will stop overcharging, the landlady will actually leave you alone for a few days before asking (politely) for the rent, and lawyers will start telling the truth, and those who were formerly victims will now be friends in the brotherhood of humanity.