They enter through Panama at the canal and head in both directions.
Some go south, settling in Colombia and as far south as Ecuador. Others head north to Costa Rica, Nicaragua and as far as Guatemala. They pass in small groups or alone, but when they reach their Pacific-coast destinations, they group up with others that have made the passage. The coastline of southern Costa Rica is exactly what they need to thrive.
We are not talking about people; we are talking about tarpon.
LINK (via: The Tico Times)