A grasshopper in the same boat or a grasshopper in the same boat?

The correct expression is "a grasshopper in the same boat". This sentence comes from the folk proverb "two grasshoppers in the same boat", which means that two people are in the same situation, and neither of them can shirk their responsibilities and need to face difficulties and risks together. This sentence vividly expresses the situation that people have to unite under such circumstances.