I keep extinct in the wild and critically endangered species of fish in my aquariums and am a member of a couple of fish focused associations who work with universities for the goal of preservation of species. been considering getting into red listed frogs and cactus, but the communities are smaller (so less access to species) and space is a premium when living in an apartment.
i wish there was more exposure of this hobby because it's such an affordable, easy and "low effort" thing to do, but a lot of people who care about the environment and animals basically get offended when you keep animals "locked up" in an aquarium. in my opinion, serious aquarists (not the pet store furniture mentality) are invaluable, as a lot of species has been saved from extinction through aquarist efforts and university collaboration to reintroduce them to their native ranges after restoration work is completed (at least Lenoardo DiCaprio made a little bit of social media impact for one of the associations in 2022).
I should add, overfishing is not the leading cause for extinction in freshwater fish, it's pollution from agriculture, as the vast majority of fish threatened with extinction have no utility to us (or bright enough colors to benefit the commercial pet trade - brightly colored species are generally not even found in the wild, and have their colors from decades of selective breeding by dedicated aquarists).
it's funny how here in Sweden the left has historically always been against immigration because of fear of breaking labour balance. the right won the race under the "new right" slogan among young voters; immediately invited millions of immigrants - there are literal interviews where the left still says they are against immigration while the right says they are pro immigration, as well as the right-wing economist saying in an interview that immigration will help higher competition among workers which will let employers lower wages and strain the welfare system so it can be dismabtled. immigration in turn had all the effects expected plus a huge upswing in crime, and the right then went out in media saying it's the left who brought all the immigrants here while the left is defending themselves by saying the immigrants are here now and we have to take care of them; which just reinforces the lie that the left invited all immigrants - and all this has accumulated to the nazi party getting a shit ton of votes and are now kicking out essential workers en masse who are all the immigrants they can touch (aka. non-problem immigrants, because the problematic immigrants can't be touched), and just talking statistics about their success of booting people out of the country while our healthcare and service field collapses. which i no doubt they will somehow blame on the left even if the left currently has no power.
it's just funny how the left is always to blame for rightwing shenanigans.