>>19075996
Agreed that the waterway is being poisoned, but there are somewhat reasonable explanations available. The video presents no evidence that the body of water is a drinking water source.
Issues Regarding the Use of Sedatives in Fisheries and the Need for Immediate-Release Options
GENERAL NEED FOR SEDATION WHEN HANDLING FISH
Unlike most terrestrial vertebrates, which can be handled without causing significant mechanical damage, fish are particularly vulnerable to external and internal injury during physical restraint. Compared with the epithelium of terrestrial vertebrates, that of most fishes is delicate and prone to damage. The epithelium can be damaged by simply disrupting the protective mucus layer, potentially compromising osmoregulation
and predisposing the fish to infection or infestation (Shephard 1994). https://www.vims.edu/people/fabrizio_mc/pubs/Trushenski_afs.pdf
CONTROL OF FRESHWATER FISH WITH CHEMICALS
ABSTRACT: Fish toxicants have been used for nearly 60 years by sport fishery managers to remove predaceous or competing fishes from gamefish waters. The reclamation of lakes and streams by poisoning unwanted f i s h is considered to be one of the better management tools,
and the demand for reclamations is increasing as more waters come under intensive management.
Many chemicals have been tried as f i s h toxicants, but the insecticides rotenone and toxaphene have been most widely used despite their disadvantages of non-selectivity between wanted and unwanted fishes, persistence in water, and toxic effects on aquatic invertebrates.
Research in the past 20 years led to the development of toxicants specific to fish and formulations better suited to aquatic applications. Further progress is noted in the search for safe, more selective controls for pest fishes in the wide variety of aquatic environments.
https://digitalcommons.unl.edu/cgi/viewcontent.cgi?article=1024&context=vpcfour
Just in case someone sees a boat with wires in the water:
On the Electroimmobilization of Fishes for Research and Practice: Opportunities, Challenges, and Research Needs
http://www.fecpl.ca/wp-content/uploads/2019/05/Reid2019.pdf