There was a report in the news that these chemicals are causing massive imbalance on the gender of the fish in the US. Bass are becoming hermaphroditic - males are making eggs and not milt!!
If that is happening with the smelt, that wouldn't be good.
Of course, with all the technology to analyze the effects of chemicals far out way the pollution of the 60's and 70's where dissovled oxygen levels outright killed fish.
