The high concentration of whale sharks in the south carribean last summer was due to a drop in the population of krill in the north carribean due to direct and indirect effects of the BP oil spill including a lowerred oxygen level due to the microbes that supposedly cleaned up all the oil. I wouldn’t be suprised if this drastically alters the population levels in the coming years. Either increasing due to proximity and therefore increased procreation, or decreasing due to lack of food supply.
Just layin in bed, connecting extremely random dots. I am not a marine biologist, just a mental doodler.