Requesting a shellos/gastrodon variant based on a Blue Glaucus/dragon slug (picrel is its underside; topside is bluish-silver and black)
more references: https://en.wikipedia.org/wiki/Glaucus_atlanticus
why? i saw this critter a while ago and thought it'd make a cool idea for a gastrodon regional (and what i'm planning could use at least a few extra dragon types)