This Dark Souls 3 mod replaces everything with crab
Yes. Correct. Everything is now as it should be.
Dark Souls 3 obsessives are a bit funny about crabs. See, in one dungeon there's the rolling ball of skeletons (don't ask) and when you take it down, there's a crab in the middle.
Why is there a crab in the middle? Is the crab involved in some sort of secret, as random animals have been in at least one past game? Is the crab related to the giant crabs found in other areas somehow? These are some of Dark Souls 3's most enduring mysteries.
I believe this was the inspiration for this video from Limit Breakers, in which every texture in the game has been replaced with a picture of a crab, using S17L's iGP11 mod for Dark Souls 3. You can use this to replace textures with whatever you like, although clearly it has peaked with this.
Now everything is crab. Crab cloud. Crab shield. Crab grass. Crab ground. Crab building. Crab crab crab. This is how it was meant to be. The true Dark Souls 3 starts here.