This is so bare facedly a profit driven land grab. These people don't give a damn about conservation or culture, they just want to use their burgeoning social power to force a kind of "Exclusive economic zone" onto their neighbors so they can implement a commercial fishery for their own exclusive benefit, free of any kind of regulatory oversight or environmental protections.

As someone who lives near a bunch of various first nations, I've seen this pattern playing out more and more lately. They come up with some bullshit rationale about "Protecting the environment and their culture," use that to brow-beat the politicians into capitulating to their demands out of fear of any kind of pushback being labeled as "Racist" and then as soon as the first nations groups gain control of an area or resource, they keep doing whatever they claimed they were against even worse than the people who we're previously doing it (ie. cutting down more trees that the loggers, catching more fish than the fishermen) and then once they've cut down all the trees and / or caught all the fish, they just plonk down some condos on their "Sacred land" and turn into rent-seeking landlords.