So what was going on? Red Tide bloom, or what?
Pufferfish are garbage, anyway.
Pollution (mostly nitrates) and extremely hot water deprives them of oxygen.
It seem you are correct.
Local news story says Hot weather mostly
What we know so far is that dissolved oxygen levels in the water near the location were very low and temperatures were very high. Nutrients from fertilizers, septic effluent, sewage spills, pet waste, and more can feed algae blooms and lead to low oxygen conditions in the water column -- causing
fish kills.2 days ago