Shell Slime

Also known as Snaily, this is actually one of the more commonly seen slimes, having actually appeared in multiple main series Dragon Quest titles besides the monsters series. They have higher than average defense.

I've been thinking about doing demakes of some other DQ slimes into the DWM2 sprite style. This guy has two sorta relatives that I'll probably do if I get to that, an ice shell version and an ammonite version.