Question

this diagram shows a food chain from a tropical coral reef ecosystem off the coast of jamaica. the arrows show how the matter eaten by organisms moves through the food chain. select each organism below that is a tertiary consumer in this food chain. diatom copepod sergeant major bar jack caribbean reef shark

Explanation:

In a food chain, producers (like diatoms) make their own food. Primary consumers (copepod) eat producers. Secondary consumers (sergeant major) eat primary consumers. Tertiary consumers eat secondary consumers. Bar jack eats sergeant major (secondary consumer), so it is a tertiary consumer.

Answer:

Bar jack