grass assemblage in the world with an area of 4800
square kilometers, thriving for the past 5000 years. Shark Bay contains the largest number of seaweed species ever recorded in a single location.
2) Sea grasses are the backbone of the food chain in shark Bay, providing a home and shelter for various marine species and attracting a population of dugongs: it is home to about 10,000 dugongs ("sea cows"), accounting for about 12.5% of the world's population
In addition to dugongs, it is home to Indo-Pacific bottlenose dolphins, green and loggerhead sea turtles, giant oceanic manta rays, and of course sharks. Whale shark is the biggest fish in the world that is feeding on plankton and reaching 60 feet long.
3) Stromatolites – colonies of algae forming hard, dome-shaped deposits, which represent the oldest form of life on Earth and are comparable to living fossils. Analogous structures dominated marine ecosystems for more than 3,000 million years.