Praise
At first, he was a little bit nervous to be putting himself out there for the entire world to see. But soon after he read some of the comments and was receiving only support and positive feedback from everyone. People really appreciated what he was doing for the animal that he just met.
They wanted to thank him for taking care of the creature and spreading a message of love and understanding. Manta rays usually have an ugly reputation that is not based on the reality of their good nature. At the end of the day, they really are just friendly sea creatures that float around.