Pupils could then be asked if they can think of examples of food chains based on what they know already. After the question ‘What do you think would happen if one plant or animal were removed ...

Food chains show the flow of energy from one ... consumer (which eats a tertiary consumer), but not in this example. Animals that are hunted and eaten are prey, and these are consumed by predators.

A marine animal snacked on some sea lilies that did not agree with its stomach—and we now know what happened next ...