Final answer:
The singular verb 'is' is correct for the sentence 'the school of tuna fish is swimming near the shore' as 'school' is a singular noun when referring to the group action.
Step-by-step explanation:
The correct verb to use in the sentence 'the school of tuna fish are/is swimming near the shore' is 'is.' Even though 'school' refers to a group of fish, it is treated as a singular noun when we talk about the group as a whole taking a single action. Therefore, the singular verb 'is' is the appropriate choice.
Some fish swim in schools, which can respond rapidly by moving quickly away from predator threats. In schools, fish swim in a coordinated pattern with the help of aural signals to communicate and avoid bumping into one another.