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?