Butterflyfish tropical ocean sea underwater 27. The total world shoreline extends for 356000 km 221000 mi and the continental shelves occupy a total area of 24286 million km 2 9 376 million sq mi. Teleosts range from giant oarfish measuring 76 m 25 ft or more and ocean sunfish. Fish are a perfect example of biodiversity since they come in countless shapes colors and sizes. This is about 48 of the worlds total area of 510072 million km 2.