Messy Abyss

The Messy Abyss was a 1st April Fools joke made by developers in one of the Content Drops, in the form of a "sneak-peak" to the biome, which was supposedly going to be added to the game at a later date. All that was shown was a poorly-made joke image, depicting an enormous Trash Crab emerging from a body of mud and trash. There was also the false promise of a complete overhaul to the game's current art style, with some concept art for it. The link to the Content Drop update page can be found here.