As of right now the settlements have no known defense against such a thing as a myrian tribe. Myri and her children would find it cute to find a settlement of weak civilized humans and... The over abundance of tastey Kelvics there.
As such, the place is also home to many unknown and forbidden technologies. This is something that myrians would likely avoid in my opinion. Although war mongering the Myri are not stupid and they wouldn't fell bait to what Syka has there.
Myrians I feel would inhabit far teaches into the jungle but going near the coast would not be in their best interest. Not even most of their hunt is done mainland and a fair distance from Syka.
That being said it might be possible for a few myrians to stumble that way, but I feel that once they discover it something would have to happen and I feel the only way to resolve this debate is if we rp it out. It could be an event for potential new pcs or even an event ran by Goss with npcs because all of you are forgetting one important detail. Myrians are savages and most have heard of them so how do you think a starting settlement would react to seeing a few of them in their jungles.
That's right they would protect it and in my opinion even start a war of hunt to kill them before they could pray or tell Myri of their discoveries. I say we rp it out.