Following the race to the sea, my understanding is - in broad terms - that there was some back and forth fighting (Ypres) and then the front (over-statement coming up) settled down until the following spring. I also understand that trench warfare reduced casualties compared to the relatively open fighting that took place prior to Ypres, but also made a return to such warfare difficult due to the power of the defender generally outweighing the attacker. So, why was an amphibious landing along the Belgium coast seriously considered? It would seem to be the ultimate outflanking move that was attempted during the 1914 race to the sea.
In the spring of 1915, Britain and France found five divisions (increased to 15 during the course of the year) to land at Gallipoli. It would seem that the two countries had the logistical and shipping capabilities, as well as the troops to do so. The following year (after further fighting at Artois, Loos, and Ypres), whole new armies were marshalled for the massive Somme offensive. After the relative failure of 1915, why did no different approach occur? The shadow of Gallipoli? I do find it interesting that it would take another year before even Operation Hush was considered, and even then it was proposal for a single division to land in the immediate rear of the German positions rather than further up the coast ala the Second World War Anzio landings well beyond the rear of the Winter Line. An actual landing would only occur in the final year of the war, less than a brigade, during a raid to try and block Zeebrugge from being used. It would seem by this point, the port had gained more importance to the Germans than earlier in the war.

So, why was there no major attempt on the Belgian coast?