Hello Adrien !
Have you considered the climbing perch fish ? It's an air breather fish , same family as the bettas and gourami . Doesn't need filter , deep tank or any complicated accessories . Found easily in most lfs , usually at a corner though because of it's plain colour . Google for the fish picture . If the water quality is bad , do a 100 percent water change and they are good to go . I know this as I have 6 of them . They are jumpers so you need to have a cover of some kind and they have been known to walk away from tanks , as my foot can attest to that .
These fish are endemic in our region , in some country , folks will eat them . All you need to do is feed them and keep them in any type of water container , albeit fish friendly container I hope . They usually come in a drab grey in color but the black ones are rare to find . They will eat anything from bread to insect which can fit in their mouth . An excellent beginner fish for anybody willing to try , just don't grab them with your hand though !
Hope this helps !
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