Unfortunately not on Android but Monster Girl Island might interest you, it's free on Steam and there's a small but decent chunk of Monsters you can choose from. I suggest taking a quick look to see if it peaks your interests. No Goblins or Mermaids as to my knowledge but there are Fox, Spider, Shark, Slime, Android and other varieties of Monster girls. It's still in BETA so it's an unfinished game but it can be interesting for the first 3 Hours. Pretty grindy in the beginning but you get the hang of it mid to late game.
Hope this helps
With Love
Jesus Christ