The crew were losing hope they would see Atlantic bluefin tuna when they caught the monster fish.
Scientists believe a lack of the vitamin could be associated with abdominal fat storage.
Activists say overfishing will have devastating consequences for the species.
The president of the Japanese restaurant chain Sushi Zanmai is now the proud owner of a whopping 441-pound bluefin tuna.
New research shows that the BP spill damaged the DNA of killifish living in the Gulf of Mexico.