This story is a hoax it says mullet are congregating on the surface
and this is strange behavior for mullet.
I live in Florida and have seen many mullet in the intracoastal waters just under the surface. I have even used a frog gig to spear mullet.
This is most assuredly not a deep water dwelling fish, and congregating at the surface is not aberrant behavior for mullet. They often jump completely out of the water.
Deep sea creatures congregating on surfacehttp://www.floridaoilspilllaw.com/deep-sea-creatures-congregating-on-the-surface-like-all-of-the-sea-life-is-trying-to-get-out-of-the-water