Am I reading this correctly?
Are you seriously claiming that corals (in the phylum Cnidaria, along with sea anemones, hydras, jellyfish, etc) are ancestral to fish and people (phylum Chordata, along with birds, frogs, lizards, etc)?!
Please provide some "evolutionist" references for this startling phylogeny. If there aren't any, then your claim that some detail of the immune system falsifies common descent is bogus.
In deepsouthhackland, cousins are likely as not your parents.
You have to go through "Fishes" to get to humans from anything ancient. Thus, my point that Fish have never been shown to have the immune functionality of coral and humans looms large.