We had tuna! Of course, it was canned tuna;(~We were so excited to see it on the menu, then it came, and we took a deep breathe, ate our dinner, and reminded ourselves that we came here for a cultural experience that happens to include a culture that doesn't place a high value on fresh fish. Maybe the more people know about sushi, the more people want sushi, the more it becomes a norm, the better it will get....Let's all hope....
Ah, the eternal quest for good sushi.
One of my faves for inexpensive, good quality (but the normal limited selection) is Bistro Tokyo in Belgrano. Very inexpensive & fresh. It's not a pretty place but it's yummy.
Also like gypsy.. rose? Drawing a blank on the name. It's Gypsy *something* in Palermo.
This is a sushi place that only does delivery - http://www.sasorisushi.com.ar/ it's the best value i've found in Buenos Aires, although it is a little sweet for some people's tastes, but still good. I have ordered it a few times as nice to change from eating Itamae sushi all the time, which is good but quite expensive now and the pieces are small.