Nature 16 Oct 1997 included a report entitled El Nino/Southern Oscillation and tuna in the western Pacific by Patrick Lehodey et al. showing that skipjack tuna (Katsuwonus pelamis) initiate a migration from their normal range north of Papua New Guinea to areas thousands of miles farther east, then return west. The movement apparently follows the eastward displacement of warm water during ENSO events as increased plankton occur at the edge of the warm water area.