If land going animals were all created on the 6th day and they all drowned in the Great Flood, why don't we see their remains mixed together? [Spirituality & Religion]

How can you claim the flood actually happened when we don't see that?
Now if you're even a half decent apologist then you're going to want to come at me with things like hydrological sorting, different environments and relative swimming abilities and i'll shut those down with facts pretty quick so maybe you have some novel arguments?
Or at least novel approaches to those arguments.