■ In Fiji, walu is the name for the narrow-banded mackerel that looks similar to ono, or wahoo, and is not to be confused with the controversial fish often known as butter fish, or escolar, that has nicknames like "the Ex-lax fish," or, in Japan, "exploding intestines."
Sometimes people confuse walu with Spanish or other species of mackerel, when it is actually a species in and of itself.
No one knows for sure where the name wahoo for Spanish mackerel came from, but one theory states that when European explorers found the fish in abundance near the island of O'ahu, the name on the nautical maps for O'ahu was "Wahoo." So, if we were purists, we would call ono, which is yet another Hawaiian name for wahoo, O'ahu. I wonder…
