This dream about the bus and the dolphins speaks of a situation where a group of people (church or congregation or colleagues) is in distress (bus). Dolphins symbolizes help and support. This group of people is either a ministry (teaching ministry or similar) or the people in a work situation. Because the figures were dark, stuck, and restless it speaks of a situation where these people are facing a problem and they feel depressed and a bit hopeless. It is possible that they do not know how to get out of the situation and they need help. The sea (unsaved masses and nations of the world) speaks of a situation where this group might be in the situation because of the acts of unsaved people. The dolphins attaching themselves to the bus speaks of people committing themselves to help these people. The sea to your left speaks of a bad situation. You a passenger speaks of you helping a friend in his ministry or assisting him with his motivation or mission or work situation. Your friend’s white vehicle symbolizes a good Godly victorious, pure and righteous ministry or motivation or work situation. If you do not know what triggered this dream, I suspect you pondered about the church or a situation with Christians, or a work situation where people experience difficulty. You need to pray and ask God what this is all about and what you need to do about it.