[TheMenacer]

For a bevy of interesting summons, might I suggest drawing inspiration from the drawings of sea life that'd show up on old maps and charts as decoration? You know the ones I'm talking about, back when a lobster was depicted as having a mammal head and two jets of water shooting out of its face and a whale was pretty much exactly the same thing but without claws. That stuff was pretty weird and would really fit the bill for an aquatic nation based on semi-medieval european notion of what the ocean was like.