Well it seems that some fishermen that were over protective of their favorite fishing hole were taking advantage of the pandemic, & if their favorite spot got too crowded they would start coughing, sneezing, etc. Other fishermen fearing the worst would leave.

This, crying wolf thing got so bad that officials are unable to tell who had the virus & who didn't. So before this got out of hand, they decided to postpone all fishing until a later date.