> You're looking for something that goes bad in less than 1.5-two hours
I don't think the target is "goes bad" as much as "degrades in quality to a perceptible–or marketable–degree". Oysters, crab, et cetera (not sure about lobster) taste different, in New York, between the restaurants that make daily fish-market visits and those that skimp to three (or fewer) times a week.