This is what we found on Wikipedia regarding the Ocean Sleeper:

The southern sleeper shark, or Whitley's sleeper shark (Somniosus antarcticus), is a deepwater benthopelagic sleeper shark of the family Somniosidae found in the southern and subantarctic extremes of the Atlantic, Indian and Pacific Oceans, and some northern reaches of the Antarctic oceans. It has been recorded near the southernmost areas of South America (such as Tierra del Fuego and the Strait of Magellan), near South Africa, southern Australia, Tasmania and New Zealand, as well as more remote locations in the south-central Indian Ocean.