Barracuda are the worst but you can get ciquatera poisoning from grouper, sea bass, or any reef fish.
IIRC, the blend of herbs and spices was designed to neutralize the poison. Lots of citrus and HOT peppers. Don't know if that's true but I never saw anyone get sick.
There are 450 listings on Gunbroker right now for just the Remington 870
And buckshot was in fact OOS or inflated in 2012 as well. I know because I bought a case of it in May and went to get more after the events and couldn't.
2012 is burned into my memory forever. I got into firearms In 2010.. by the time I was putting together a collection and stacking ammo, and was flush with cash... i found myself twiddling my fingers waiting for instock notifications and overpaying for everything.
Idk back in the aftermath of Sandy hook, you can still find shotguns and buckshot. Now its tough to find a pump action shotgun with some buckshot. Pretty anything that can be used for self defense is off the shelves