Question

yellowfin tuna, or thunnus albacores, are large sport fish that are found in tropical and subtropical waters around the world. they typically school under objects such as boats or patches of driftwood for protection from predators. schooling under these structures also provides yellowfin tuna with easy access to a food source such as smaller herbivorous fish that may be foraging for food around the structures. which trophic level does yellowfin tuna fill in a food chain?
producer
primary consumer
secondary consumer
tertiary consumer

Explanation:

1. First, recall the definitions of each trophic level:

• Producers are organisms that make their own food (e.g., plants, algae) through photosynthesis or chemosynthesis. Yellowfin tuna do not produce food, so they are not producers.
• Primary consumers are organisms that eat producers (herbivores). The text states yellowfin tuna eat smaller herbivorous fish, so they are not primary consumers.
• Secondary consumers eat primary consumers (herbivores that eat producers). Since yellowfin tuna eat smaller herbivorous fish (which are primary consumers, as they eat producers like plants/algae), yellowfin tuna are secondary consumers.
• Tertiary consumers eat secondary consumers, and there's no indication yellowfin tuna eat secondary consumers here.

Answer:

C. secondary consumer