This is the blue dragon sea slug, also known as Glaucus atlanticus.
Not only is the blue dragon immune to its sting, it’s able to process the Man o’ War’s nematocysts, the cells that allow for that creature’s deadly sting, and store them in its own extremities.
Those venomous cells can be used by the blue dragon later on, and in a higher concentration, making their sting even more deadly.
Some original design creatures I’ve been working on! I’m hoping to put together enough of a collection that I can start offering products with them for you all! Be on the look out for them in the futurrreee.
It may look photoshopped but it’s a real creature! Glaucus atlanticus (common names include the sea swallow, blue angel, blue glaucus, blue dragon, blue sea slug and blue ocean slug) is a species of small, blue sea slug, a pelagic aeolid nudibranch, a shell-less gastropod mollusk in the family Glaucidae.