I second Diegos suggestion! would definitely fit the pirate look more than the aztec/mayan design! or maybe something else but still jolly rogery, maybe a sea shell, a crab shell or a giant shark tooth.
yes! or maybe facing out instead of up? but yes. with some more tentacles visible. they have 6? 8? not sure. also i like the hi mom lol edit: I really think that will really take your character into that pirate skin 100%
Thanks to many feedbacks I finally found something I'm happy with for this shoulder armor, but since my version of Rengaaaarh is not "pirate of the caribbeany", it couldn't be a living octopus :D I also tried some color variants, feel free to tell me what suits him best :) and a quick composite to see if he fits the map…