idea for Aquatic Poly’s <: The red on his nose can be either paint or nasal strips! (started as one, ended as another) :D which aid Poly’s when out of water for extended periods. The strips can be decorated with different patterns and an assortment of colors

Their head tentacles can be hidden inside their helmets that have their own little subspaces inside and can also move on their own

and I couldn't help myself giving him an axe again