*backs over this blog in a dump truck and pulls the lever, a cascade of fantrolls falling out all over it*
all of these except follie were to show my headcanon that seadwellers can be any blood color but the genetic rarity of it gets exponentially higher as you go lower on the hemospectrum. for example, violet and fuchsia are ALWAYS seadwellers, a purple seadweller is a 1/10,000 chance, so there might be a few hundred of them currently on alternia, while a burgundy seadweller only happens once every few dozen generations. maybe theyd also get culled for being genetic anomalies, who knows? mostly i just wanted to make some cool fish aliens