Epic Bluefin Migrations

Bluefin are highly migratory fish, crossing seas around the world in yearly cycles of spawning and feeding. At least two groups share the Atlantic. One spawns in the Gulf of Mexico, the other in the Mediterranean. The groups mingle in the center of the ocean. Some fish even spend years on the opposite side of the ocean from where they spawn.
Map: Ryan Morris, NGM Staff
Source: Barbara Block, Stanford University