During the release of Happy Aquarium, the feature "sickness" occurs if you did not feed your fish or other animals on random days. A fish/animal will get sick if you haven't fed him/her in random days. To heal the fish, you must purchase medicine with coins. The feature was later removed in late 2010, due to many feedback from Happy Aquarium players.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.