I'm really touched you like them! but sea beasts are a personal species i made to represent my own gender identity and emotions, they're not really in the realm of closed or open species and I prefer that people don't commission me for them or make their own. you can totally make ur own sea serpent ocs ofc, i have no control over the idea of that n.n I just ask that you don't take too much from my sea beasts in your own designs!