What is an aquatic six-link food chain with a shark at the top?

1. Phytoplankton (microscopic algae)

2. Zooplankton (microscopic animals that feed on phytoplankton)

3. Small fish (such as anchovies or sardines, which feed on zooplankton)

4. Larger fish (such as tuna or mackerel, which feed on small fish)

5. Marine mammals (such as seals or sea lions, which feed on larger fish)

6. Sharks (such as great white sharks or tiger sharks, which feed on marine mammals and other large fish)