Although Puerto De Mogan - Gran Canaria, is not very big, there's still plenty of restaurants, and almost all have views over the harbor.
In a port like this, you naturally eat fish, and several places have a dish where you get several different fish, so it's just to get started with your fingers.
You find also some places where you can get local Tappas, and then there are specialties from Germany, because some of the restaurants run by Germans.