This is a food web of the most well known species of the Great Barrier Reef. At the bottom it shows the primary producers, and as you go up, you see all three of the trophic levels. To name a few, some primary producers would be the turtle weed, sea grass, and algae. Some primary consumers would be zooplankton, coral, and sea urchins. Secondary consumers would be jellyfish and sea slug, and lastly the tertiary consumers are the tiger shark, white tipped share, and black tipped shark.