Is there a theoretical model for a species to fill all possible

my initial thought are it would have to be inherently cannibalistic, have a high reproductive rate, and a high tendency to be territorial

>>2361483

Marsupials you dumbshit. They permeated every niche, including flying fucking marsupial squirrels, and marsupial tigers.

File: RingworldMcQuarrieCroppedLrg.jpg (78KB, 526x519px) Image search: [Google]

78KB, 526x519px

>>2361483
Humans.

/settled

No. For one thing, you're asking a species to be multicellular and unicellular at the same time.

>>2361496
Marsupials are not a single species.

>>2361508

They were. At some point very close relatives must have been predator and prey when they started to diverge.

>>2361516
They were never photosynthetic though. What are they going to live on? Once we introduce plants or microorganisms for it to eat and digest its food with, there is more than one species in that environment which is against the original premise.