The blue-ringed octopus species group is a famous one. The smallest inkfolk, the bluerings come in three distinct species; the blueline, bluering and bluespot (although for simplicity's sake, all of them are typically included in just the context of bluerings). Out of these, the bluespot is the largest one, although even at this larger size they are hardly half the height of most inkfolk. All three species inhabit the Eastern continent, in which they are extremely widespread between temperate, arid, harsh desert areas and even the southern rainforests. Out of the three species, the blueline inhabits the northernmost habitats whereas the bluespot can be found along the rainforest edge and interior, although their ranges widely overlap.

Bluerings have historically had a difficult reception among other inkfolk due to their distinctive venom that is lethal to nearly every other type of ink- and finfolk. This maculotoxin is unique to the group, and powerful enough to induce full-body paralysis in trace amounts. This venom has been both widely feared and sought after by other species throughout history, and it has had a notable presence in quite a few political assassinations...

The deimatic display of bluerings involves a bright yellow, white or orange coloration with iridescent rings on full display. Without this warning display, bluerings are typically white or brown with the rings concealed.