Jared sent me this blog post, by Antonio Martínez Ron. I've heard of the ocean sunfish before, but Antonio's post does it some real justice. I suggest you read his write-up, but here are some highlights:
Photo from: Jens Kuhfs
The ocean sunfish (mola mola) is the largest bony fish in the world. It is a unique pelagic fish, and specimens of ocean sunfish have been observed up to 3.3 m (11 ft) in length and weighing up to 2,300 kg (5,100 lb).Curiously, the Ocean Sunfish has a very small brain compared to its size: A 200 kg specimen may have a brain the size of a nut weighing only 4 g. It would explain their quiet behaviour and how often they get trapped into fisher nets.
...Giant sunfishes are an important menace for little ships. A collision at high speed can cause both injury to sailors and damage to yachts.
Photo from: Diving.LiveDoor.biz via Hiroto Kitagawa
Finally, the flesh of the ocean sunfish contains neurotoxins similar to those of other poisonous tetraodontiformes, but it is considered a delicacy by some people.Photo from: Stranypotapecske.cz