Shark: animals are defined as neutral.
By One: Sharks are chaotic. By Three, Animal Companion variants invert to lawful. By Four, both of these invert.
They are wet, but not hard or crunchy, so they are not neutral.
Yet being animals defines them as neutral.
Have I disproven your theory?
Edit. If shark might qualify as "hardc or "crunchy" I'll dock your theory points for lack of clarity and resubmit the same question with octopus or squid.