Water Spirit by Genkicoll

Water Spirits reside in the waters of the world, from oceans to lakes to rivers.

They are mischievous creatures who enjoy playing tricks on the unwary. While they never do any real harm, the pranks they play have caused many a sailor to curse the misfortune of having come across the spirits.

These spirits do not breed the way flesh and blood creatures do, but they will "call out" to others to come and join them now and then, bringing new spirits to play with them. They may, likewise, get bored and leave if there is not enough to occupy them, so if you decide you no longer want them in your zoo, all you have to do is ask them to leave... or make them a better offer!

Configured to like both neutral-habitat and bad-habitat items, these spirits will love almost anything you decide to throw in their exhibit.

Many thanks to Jane for the original .gifs.