I couldn’t say for sure what spawners are in LP. I was playing in a custom world when I did this. I do remember that my sim found sewer trilobites and sea sludges in the open ocean with no spawners in the area. And I had placed the ITF spawners in another world she traveled to so she wouldn’t have to trigger the utopian and dystopian futures for only two different fish types. I think I just put them in IP since I had her travel there anyway to catch the fish you get from diving.