I am fairly certain that it was never stated that Vander Decken the First was human. There's no mention of that anywhere.
Veritas
2022-09-14 02:32:35 +0000 UTC
Oh, cool little detail, I had forgotten about that: Van der Decken was in a bubble when visiting Hody Jones, and we know his ancestor was human. I think he can't breathe in water? Oh, or maybe he just has to avoid the sea water because he is a fruit user, I guess that could be it.