That's not a fish, though. It's a mermaid.

see, thats the thing that confuses me. since a mermaid is a mythological creature, we cant study them, we cant analyze them beyond what we see and what whoever is explaining them to be, so they cant be associated with a fish or a human. so would they just be called a hybrid, or would they be associated solely with one or the other?

There's actually a field called cryptobiology, which deals with mythological creatures and how their bodies would work if they were real. And there is no logical reason for fish species to develop human-like features. Therefore, it makes sense that mermaids originated from an ancient human subspecies, which started living in the water and developed fish-like features to adapt. Like whales and other sea mammals did.

which still begs the question, if they had to commit to one kind species, would they be considered human, or fish? or does cryptobiology explain this too.

regardless, suu is best. she can't be a subspecies of human, surely.

Yes, she's the least bitchy of the bunch. And I have no idea. The mechanics of how a slime girl would function are beyond me. Just trying to figure out what's giving that adorable little serial rapist her shape and preventing her from turning into a puddle would take forever.

there is a biology... thing about her. the head antennae thing is her, or rather her brain. everything else is completely malleable. not even her eyes are necessary. theyre there for aesthetic effect purely. but i guess, if i were to make sense of it, the brain thing has a psychic power of some sort which keeps the gel she's made from as one. reminds me of Goop from that newer ben 10 show.

That still makes no sense from a biological standpoint. There has to be SOME internal structure keeping her together, unless she can individually control every single damn cell in her body.

that is likely, which may or may not correlate with the special psychic thing. then again, slimes dont have much explanation as to their existence. im curious now, im gonna look it up. though in all said and done, shes still my favourite.

Tech, Undyne is a demon, and not a fish.

No she's a fish monster. Not a demon.

en.wikipedia.org/wiki/Undine