“Strangely, son, your DNA hasn’t changed at all from before. As though the Piscine DNA has always been there. Which can’t be right, I never used any DNA besides my own when I made you and your sister… At least I don’t think I did. Did I? Hm… Maybe I should check my notes again? It’s been a while since then…”
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This story also works from the idea/theory that Prof. Membrane cloned himself to make his kids (yay, test tube babies!) And he may be an amazing man but, as the saying goes, “the old memory is the first thing to go.” XD
(More story getting hinted~)
Also, Piscine is one of the fancy/scientific terms for fish and comes from the Greek word “Pisces”