Tried this out with some friends and made some extremely funky beasties living in a cloud forest. Our scenes after creature discovery were staged like we were researchers out in these woods, finding these creatures for the first time. We narrated our potential process for having found these animals, describing their striking and odd features, and speculating upon the function of said structures and the scenes we observed that would eventually help us fully understand their ecology.
We firstly ended up with the Humphrish, a pollinating fish with long, nectar-licking mouthparts which resembled the brightly-colored inflorescences on a bromeliad, which was where the females of the species would live. Sequential hermaphroditism would occur when males (responsible for guarding the eggs dropped from the treetops by the female, and normally found in the leaf litter at the foot of trees hosting these bromeliads) would climb the tree and attempt to oust the female.
Predating upon these fish was a small, mantis-like insect that would bioluminesce in a way that resembled the female humphrish's mouthparts, and trick males into climbing up the trees to it. Per our scenes, it initially escaped our notice because it wouldn't activate its bioluminescence when we were out in the woods at night with torches!
Finally, the apex predator of this ecosystem was the "sharpcat". We had to take some liberties with card interpretation for this one, as we ended up with the King of Spades (sedentary, very large groups) for its third card. We decided that this microraptor (with clawed wings, winged legs, and a stiff tail ending in an additional hook which acted as a rudimentary fifth limb) was the wild, ancestral species that was domesticated into this world's people's equivalent of our domestic house cats. While technically an active hunter and solitary in the wild, their domesticated descendants are generally more placid and live in high densities within households in urban areas.
An all-round excellent game and one I'm keen to return to, both with friends and as a solo adventure.