One of my favourite seafood restaurant in The Hague is Mero. I have been to Mero several times and have never been disappointed by the consistency of the quality of the food and service. What I usually have at Mero is the dinner surprise menu where you can choose 3 courses or 4 courses. The 3 course surprise menu costs €32.50 and the 4 course costs €37.50.
Mero also offers a 2 course surprise menu at lunch time for €25.50 where you can choose to have a starter and main course or a main course and dessert.
In the summer season, it is open everyday from 12:00-22:00 apart from Monday and Tuesday. In the winter, it opens later at 14:00. However, although the restaurant isn’t open until 14:00, if you call the restaurant in advance, the owners are accommodating and will open the restaurant earlier at 12:00 or 12:30 for you.