You have to remember the Gulf Stream is functioning at tiny fraction of what
it was 5 years ago, and the ocean is facing desalinization due to enormous
chunks of Antartica and the Nothern Ice Caps falling off and melting away.
That alone will change the compostion of the water ways and how it flows,
which in turn will affect the magnetic lines the animals use to navigate.
Also, the Navy uses those damn sonic dohickeys now that have been PROVEN to
screw up migratory patterns in sea mammals and turtles, as well as some
larger fish. We are killing ourselves and no one seems to give a damn.