Okay few things... you can uncheck the use fresh ingredients and you can make tuna maki roll without the bluefin tuna. Some other recipes even with use fresh ingredients clicked off you can't do that with.. but this one you can... so the dish isn't off limits for anyone. You don't need to get the illegal fish to do it. My sim had no fish in her inventory/fridge or storage when she made it so no fish imagined or real were harmed in the creation of this picture.
https://i.imgur.com/9aVwDJi.png
https://i.imgur.com/qCDL017.png
Next... if you want to play a your game in a way where you don't catch endangered fish, the game makes it a point to give you that option. If you choose to keep those fish you definitely know what are you are doing. This one isn't the bluefin one but I didn't try that hard to find one. Here is the type of message you get though.
https://i.imgur.com/JaUtShP.png
I got that image from another sim I play that is a fisherman and kept the fish. He wants the trophies on his wall despite any consequences that could happen. Personally I like having options like this because the world isn't all sunshine and roses and sometimes I play bad sims on purpose. Much like some people might play out... I dunno blood sucking vampires, kleptomanics, cheaters and more in their sim games.
It's a game that you can tell stories with, and you can even learn lessons through sometimes. I think it's more than well covered in this instance.
