"landmasses" Landmass's.
"This toxin, while not deadly but still potent enough to make anything that would consume be overcome with a sense of noxiousness, is not something of their own making." This sentence is too long.
"vaste" hould be "vast".
"a substance normally forbidden" is poetic, but not quite accurate. I'd recommend "a substance normally inaccessible" or "impossible to obtain".
Shouldn't "Maineiac river" be capitalized?
"strips" makes semantic sense, but I think you meant "stripes", which is more typical.
"help agape": Did you mean "half-agape".
It's interesting to see another organism using the food source of minifees, and taking advantage of the fact some are poisonous.
Is that green bit near the eye part of the eye, like a plica semilunaris, or just decoration? If it's a physical structure, it might help in a potential small project to determine how related the Srugeing descendants are to each other.