Well, it sounds like the good intentions were there but dayum!!
Interesting good to know since I always label Live Fish with UPS next day and never had a problem. When I get live fish USPS I ask the post office to hold for me (small town post office 1 or 2 employees).
Just Call Me Chuck
Disclaimer : I am an old man and all this information is from the top of my head so any mistakes noted I claim the 5th