From what I've put together thus far using just a magnifying glass and a hat:
Burkett is not the true source of the memo. Neither is Barnes. There are big fish swimming in this ocean. And by big fish, I mean the kind that, if caught, would get sliced open to reveal a whole school of little, putrid fish in its guts.
This fish is rotted from the inside out it seems.
Also, there's a missing fish. Somewhere on the fishy food chain between the guppy Burkett and the shark Barnes is one clever fish who brought the two together.
Now I'm hungry. I think I'll get sushi for lunch.