My current foolish endeavor is raising bamboo shrimp. They require brackish water for their early life and then a gradual change to freshwater eventually. I just hit the 1 month mark. All bamboo shrimp for sale are collected from the wild (that I know of!).
Not foolish. You’re making yourself stretch to test the limits of a worthy endeavor/hobby, which others can learn from to avoid error. I was surprised to see how many varieties of shrimp there are besides the pale pink eating variety everyone is familiar with.
And it’s really cool to see other aquatic life other than fish in aquariums. If only we could keep those octopi in the tank and out of the trees...