Could this not have been simply an instinct to find cleaner waters? I&#x27;m surprised they didn&#x27;t add another control group which injected something unpleasant that could be naturally found in an area, but would be undesirable - ammonia, some sort of acid, or something along those lines.

Whether it is or is not, is not a function of the cocaine though, but rather idiosyncrasies of the wider ecologies the salmon are in.<p>If roaming more widely introduces them to more productive food opportunities (or, lower predation) than their closer ecology, then it would be beneficial for them. If it does not, then it wouldn&#x27;t be. Neither context is determined in the basic finding that cocaine causes them to roam more widely.

I think another study is in order examining how cocaine affects breeding habits.

Roaming more widely may not be healthy for the salmon.

If that is not one good argument to start producing cocaine locally, then I don&#x27;t know!<p>Save the fish.