Fresh seafood is difficult to bring, because I don't know where you come from and how long it will take to get home. Generally speaking, shellfish can be kept for a long time, and fish is basically unreliable unless you are near the North Sea. If it doesn't work, you can consider taking some squid, buying a foam refrigerator for a few dollars, putting some ice in it, freezing it and sealing it with transparent glue. Basically it can be guaranteed for two or three days. I work in Guangdong, and sometimes I bring it like this. Sometimes I fry the squid and put it directly in the foam box I said. It's been 9 hours, and it's still very fresh. After stir-frying, it tastes ok. Someone mentioned crabs upstairs. Try not to eat them when they are dead. Shellfish can consider taking "car snail". Or you can simply bring some dry goods, that is, don't buy shredded squid, most of which are fake and unclean. ...