To be frankly and bluntly specific - and I'm sorry for this - consumption of escolar causes explosive, oily, orange diarrhea. People have reported that the discharges are often difficult to control and accidents can happen while passing gas. I personally know someone who ate an escolar steak one night, unaware of its side effects. The next day he was riding the elevator to his office when out of nowhere his bowels unleashed a surprise attack on his pants. As he said later, "Thank God I had my gym bag with me, which had a clean pair of underwear in it." This explains why escolar is also called the "olestra fish" and the "ex-lax fish."
What might this have to do with Asia? Sad to note, escolar is all-too-often mislabeled as tuna (or "super white tuna" or "king tuna") in sushi restaurants. A recent survey of fish outlets (including sushi restaurants) determined that an astounding 74% of fish in sushi restaurants are mislabeled. And,
84% of fish samples labeled “white tuna” were actually escolar...