Place fish into a glass bowl and add lime juice. ( I always use a glass container because metal bowls might give the fish a different tast because of the lime juice. ) COVER THE BOWL AND LET IT SIT OVERNIGHT IN THE REFRIGERATOR. You will notice that the fish will become a real white color after it has COOKED in the lemon juice.
3 hours before serving, finely chop celery, onion and jalapeno peppers and add to the fish and lemon juice. Mix well and serve with saltine crackers.
In Costa Rica, seafood cocktail sauce is missed with the fish and other ingredients. My family loves it both ways like it both ways.