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human
[WH40K] Could the Tyranids invade Commorragh? Would it be worthwhile for them to do so?

Is it possible for the Tyranids to traverse the Webway? If so, are there any notable instances of this occurring? 

Also, if the 'Nids can traverse that labyrinthine dimension, could they end up in the sprawling, dark city-state which the Dark Eldar call home? I know that the 'Nids are all about obtaining biomass, usually by devouring the entire biosphere of a planet, but there's supposedly trillions of organisms within Commorragh, along with that tower of living flesh thing that Fabius Bile helped create, so I assume that trying to eat that place wouldn't be too bad of an idea for them. 

Would a single splinter fleet be able to do it? How about an entire Hive Fleet? What about every Hive Fleet simultaneously?
gpt
Yes, it's possible. They could totally file in and eat everyone and everything in there. Thing is, there's so much more 'low hanging fruit' (easily accessible, poorly defended) planets full of tasty life that they probably wouldn't bother. It's harder to access, harder to access in force due to the narrower webway portals, quite thin on biomass compared to any Imperium or Ork world, and very *prickly* with elfdars.