I was inspired by this Skyrim "Master Chef" run:

Although it's not on the skyrim leader boards because it's a silly category, I think this could be a potentially fun run category.

Basically the objective is to build a "zoo" with every piece of (movable) alien fauna and/or flora in it. It could either include or exclude sea emperor eggs. I would exclude them as it would then basically just be an Any% run without the rocket and sea emperor eggs aren't placeable in alien containment anyway.

AFAIK this would be: Eggs:

• Ampeel
• Boneshark
• Crabsnake
• Crabsquid
• Crashfish
• Cuddlefish
• Gasopod
• Jellyray
• Lava Lizard
• Mesmer
• Rabbit ray
• Sand Shark
• Spadefish
• Stalker

Grabbable Fauna:

• Bladderfish
• Boomerang
• Eyeye
• Garryfish
• Holefish
• Hoopfish
• Hoverfish
• Magmarang
• Oculus
• Peeper
• Red Eyeye
• Reginald
• Spadefish
• Spinefish
• Floater

Plantable Flora:

• Acid Mushroom
• Bloodvine
• Blue Palm
• Brain Coral
• Bulb Bush
• Cave Bush
• Creepvine
• Deep Shroom
• Eyestalk
• Furled Papyrus
• Gabe's Feather
• Gel Sack
• Ghostweed
• Jellyshroom
• Membrain
• Pygmy Fan
• Redwort
• Rogue Cradle
• Sea Crown
• Spiked Horn Grass
• Spotted Dockleaf
• Tiger Plant
• Veined Nettle
• Violet Beau
• Writhing Weed

Land Based Plants:

• Bulbo Tree
• Chinese Potato
• Fern Palm
• Grub Basket
• Jaffa Cup
• Lattern Tree
• Marblemelon Plant
• Pinkcap
• Speckled Rattler
• Voxel Shrub

I'm not talented enough to do an interesting speedrun of this, but it could be a unique challenge as you'd need to scan alien containment, exterior/interior growbeds and bring them all to a single location. I'd have the caveat that the "zoo" must all be located in a single base, and everything must be alive at the end of the run (tiger plant will kill your fish).