Atlantic spotted dolphin (Stenella frontalis), met halfway from Funchal to Desertas Islands, Madeira Archipelago, Portugal
Since you loved so much my picture with the dolphin couple - www.flickr.com/photos/virgilio_fnc/515845079/ , I found another one taken at the same time. Same flat sea, and love the top fin just slightly coming out of the water.
Both lucky shots. Honest.
This picture was taken during a trip with friends to Desertas Islands. If you want to see more, there is a full photo report, including more dolphins, at the DisPorto Bay blog.
(This one just reached 22.000 views. Thank you all for visiting!)