Overnight storing of raw fish I discovered that I love raw fish. I'm planning to buy a sushi-grade fish to make myself a sashimi or poke but I wonder if there is method of bringing it for lunch to work after preparing it day before.

Is it possible to store a prepared raw fish (poke/sushi) in fridge/freezer overnight or is this a safety hazard and it needs to be eaten soon after preparation which includes thawing. 

EDIT I mean fridge at home then at work. I live 5-10 minutes from work so if isolated it should not change temperature significantly, I think.
Keeping it in a regular refrigerator should suffice for most situations even for a couple of days, but for longer periods freezing is probably recommended.

As for transportation to your workplace I'd recommend a thermal bag, or insulated bag, or any type of insulated plastic box or container should do the trick well.