Background: The mahi-mahi (Coryphaena hippurus) fishery in Panama started in the mid 1980s. Mahi-mahi is a highly migratory pelagic species reported in more than 30 percent of the ocean surface, living mainly in tropical and subtropical areas of the Pacific, Atlantic, and Indian Oceans.
Depends on how the body is orientated and how long the exposure is. Also depends on whether youre talking about survival only, or if you want the human to be able to do something. 9 G or thereabouts is pretty much the limit for remaining somewhat functional for a few seconds. But for sheer survival the limit is far higher, and frequently experienced by car crash victims for instance.
InfoPlease explains that human skin weighs between  8 to 10 pounds in normal adults, with around 22 square feet of area. The skin is the largest organ in the body in terms of weight and area. One of the smallest organs in the body, the pineal gland, weighs around 0.2 gram, or 0.007 ounce. The pineal gland is in the center of the brain, according to Kids Discover. The parathyroid is between 0.004 and 0.006 ounce, or 0.12 to 0.18 gram.