1. Ocean Food Chain Lindsay Innes and Charity Sonier

2. Coral Reefs Coral reefs are underwater structures made of Calcium Carbonate secreted by corals. Individual Polyps group together and grow, secreting this hard exoskeleton, which eventually builds up and creates a Coral reef. The complex structure of coral reefs offer fish numerous shelters, refuges and microhabitats These are the result of millions of years of coevolution among algae, invertebrates and fish. They have become crowded and complex environments, and the fish have evolved many ways of surviving

3. Phytoplankton & Zooplankton Phytoplankton obtain energy through photosynthesis meaning they’re autotrophs, while Zooplankton are heterothrophs, who use organic compounds as a source of carbon. These are the bottom of the food chain.

4. Bacterioplankton & Sponges Along with Phytoplankton and Zooplankton, Bacterioplankton and Sponges are also at the bottom of the food chain. Both Sponges and Bacterioplankton can be found in both fresh water and salt. Sponges are sessile aquatic creatures, and do not have circulatory, nervous or digestive systems.

5. Coral Fish Many reef fish have a body flattened like a pancake, with pectoral and pelvic fins that act with the flattened body to maximize manoeuvrability. Many reef fish species have evolved different feeding strategies accompanied by specialized mouths, jaws and teeth particularly suited to deal with their food sources found in coral reef ecosystems. This is not surprising, given the huge variety in the types of prey on offer around coral reefs

7. Puffer Fish Puffer fish are generally believed to be the second–most poisonous vertebrate in the world, after the Golden Poison Frog, which is the main reason why it is so high on the Food Scale. The puffer's unique and distinctive defenses help make up for their slow moving bodies. They are carnivorous, therefore they eat crabs, clams, snails, oysters, crayfish, and shrimp.

8. Squid Squid have eight arms, and two usually longer tentacles. They are Heterotrophs, and hunt for their food. They eat shrimp, cod, herring, plankton and some species of giant squid will eat small whales if they can manage it.

9. Moray The Moray is a type of Eel, in which there are more than 200 different species. They are pretty much on the same trophic level as Squid, and have a very similar diet. They are found in both tropical and temperate seas, but mainly in warm, tropical ones.

10. Barracuda The Barracuda is a fish known for its large size and fearsome appearance. Its body is long, fairly small, and covered with little, smooth scales. The barracuda is a salt water fish and is found in tropical and subtropical oceans worldwide. This predatory fish is also on the same trophic level as Squid, and Eels.

11. Sharks Sharks are a type of fish with a full cartilaginous skeleton and a highly streamlined body, made for short-term speed. These fish are at the top of the food chain, in both open water and coral reefs. They are carnivorous, and eat many types of small to medium sized fish. There are as much at 440 different species of Sharks, and certain types are more prominent in Coral Reefs than others.