Talk:Monster Girl Quest: Paradox/@comment-31628587-20170717000622/@comment-26898718-20170717012216

The Manta girl can be found out in the open sea past the navy HQ's big gate once it's unlocked. The sea anemone girl, sea dragon girl and narwhal girl will all spawn in the open ocean as well so if you see any of them you're in the right place. Manta girl and Narwhal girl are both rare spawns however, so it may take some time to encounter one, especially considering the already low random battle rate on the ocean so I'd reccomend using the "encounter quintouple" ability to speed things up a bit. Don't forget to use "invite ally" once you raise that affinity since it boost your chances significantly (you can get most monsters at 100 in one or two shots with it active), happy hunting!