When I finally went to go finish single player mode, I had to play through the level with the octostriker in urchin underpass. But when I got up to the saucer at the top, I noticed some things. For one, you can't see anything that could possibly resemble moray towers in that stage. Although there is the fact that Callie and Marie said that the underpass might be under the highway in moray, which is a big clue. Two, I saw the telephone poles from sheldon's training plaza, flounder heights, ancho-v games, and camp triggerfish. Now if you don't believe that ancho-v and flounder lie close each other, check out the telephones poles. In both stages, they rise from the same type of tree. A detail that I think nintendo would only include on purpose. Now I did re-think my theory about walleye warehouse and ancho-v sitting right next to each other, since you can't see any other warehouses next to ancho-v, and you can see two warehouses on either side of walleye. So now I will continue my search for walleye in the background of other maps, since the background in walleye is vague. So we're looking for three side by side warehouses with glass dome roofs. Still nothing on Mahi-Mahi. But back to urchin underpass. You can see mountains in the background while standing on the saucer. Some of which appear to be the ones from triggerfish, others have the Yosemite half-dome-ish feel to them, like the ones in piranha pit. Further speculation will be needed, but until then, I will release Inkopolis Master Map 1.0.2.
P.S.- Still nothing on the whereabouts of Museum d' Alfonsino, I am having internet trouble where the TV is located, and can't play on any online stages. So I'm limited to battle dojo and octo valley. (also this is my 50th message on this thread :))