According to a new paper showing temporal and spatial patterns of migratory routes and spawning grounds of bluefin tuna, they were in the Gulf of Mexico spawning at the moment the oil well exploded and all that oil started gushing out (and then dispersed with toxic chemicals).
Nobody is fishing there now, and no professional media or amateur reporting or photography are allowed, but I am assuming some of the radiotransmitters in some of the individuals may still be operational and that data from the area, during the spill, will become available in the future.