how lucky indeed.

things ive been thinking bout in no particular order

radial symmetry. it's actually been hard to get out of the mindset of down the middle symmetry that the majority of earth life has- you'll see on some of these I couldn't help but break it and give them different limb structures- it's also been tough cuz ill sketch a critter and go "man this just looks like a really unique Eridian" and have to change enough to make it look like an actual animal

apposable thumbs. humans became so advance in large part to us evolving apposable thumbs, I realized on Erid it doesn't have to be the same. most predatory creatures on Erid have the same claw/grasping structure. Eridians had no evolutionary reason to have a more advance way of grabbing stuff- they became advanced for other reasons

life made of nonorganic material. Eridians are made of mostly heavy metals and minerals. what else can life use as building materials on Erid? there could be long fibers made of a silica- making a fiberglass like material, steal made thin and flexible like wool, polymers forming a natural flexible plastic, etc.

haven't really thought about specific predators and prey (yet,) just kinda making fun shaped guys and thinking about how they move around :) also not a biologist or a chemist or anything like that! just a creative with too much time and an interest in speculative biology - combine with my obsession with this silly alien best friend story <3