The Great Marlin Race

If you would like to see the tracks, move the time slider in the upper-left a little ways to the right, then drag the left end of it back to the start of the timeline. The gap between the two pieces of the slider control the length (in time) of the tracks on the globe. You can make the gap span the entire timeline if you want to see the full lengths of the track at once, or you can set a smaller gap and click the clock button above the timeline to animate the tracks, following where the marlin went by date.