I don't see why not. You would need the agaric mushroom at ready for harvest on land. Also would need an underwater seed and a Fairytale pot to plant it in or a pot that you have won in the pottery lottery. I see you haven't done pottery lottery so just something to keep in mind. You can buy a Fairytale pot in the pot shop...on your garden wall there is a picture of a pot...click on that and then find Fairytale and buy one of the three little pig pots. So once you have the underwater mushroom fully grown...put out food to attract the mermaid. And once she visits you are underwater and ready to attract the watery sea dragon.
If you wanted to collect the watery seadragon in your garden into a rock...you could get pondweed and from the pondweed...guppies or red snappers. So what you would do would be buy a red rock from the pot shop...put it in your garden...and when you have five watery sea dragons spotted in your garden it iwll drop pondweed in the red rock. Dust up the pondweed...and red guppies will show...and perhaps red snappers(another fish).

Welcome back!

I see that you have a trick or treat seed planted. When it becomes ready for harvest...it has to become fully grown first....it will produce either a treat...which is ten gold when you harvest it...or a trick which will be one of the scary backgrounds...like a spider web or cats' eyes. The background effect lasts for a number of days as long as you keep the plant in your garden. It does not attract anything.
If you want to have seasonal ghosts...then you need to plant a Hallowe'en flower which can be obtained in the giftshop or if a Facebook friend sends you one(will find under the little gift icon under the word help at the top of the page under the green line). When that plant is fully grown and in bloom...it will attract cats and bats to seed in your garden. When the plant goes ready for harvest it becomes a ghost and will attract the ghostlie mice and ducks plus the cats and bats...and it will do that for a week.

What would you like to know?

Thanks Helen 😀

Thanks for our macaw x

thanks for spotting my okapi

Helen Tyvm for the Mallard Duck feeding on the veggies 💕🥕🍇🦃🦃🦃

Thanks for spotting my Mosa

Thank you for spotting platypus.  I would splash but I will not spot anything I will try latet.🥰