Sushi grade fish is fresh and has been inspected. Then the fish is frozen to a very low temp to kill any parasites. This is the requirement for commercially served sushi in the U.S. That being said, fresh fish that has been inspected should be okay for home use if the source is a reputable one.
I am a vegetarium. Sorry , i can not privide information in this regard.
Yeah
No sushi grade
They have lots of fish in tanks. I have never made sushi I wouldn't know what to look for. You can call them they have guys working back in that department
Yes the fish is fresh arrives alive before being prepaired
Yes
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