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Blue Barnacles are a flora species that grow in abundance on the underside of the Twisty Bridges.
Blue Barnacles superficially resemble cluster of barnacles, embedded in a calcified, dark gray base. They have a maw with a light turquoise bioluminescent glow.
Blue Barnacles visually look very similar to real life barnacles, however they are a species of flora, rather than being a type of fauna.
Blue Barnacles growing on the twisting rock structures in the Twisty Bridges
Old concept art
of the Twisty Bridges, showing the Blue Barnacles