Sim Aquarium is a free personalization app for Android 9.0 and up that provides an interactive 3D virtual aquarium experience. It allows you to sit back and relax while watching a variety of marine fish swim in a colorful coral reef habitat. Additionally, you can tap your screen to bring the fish closer or even scare them off.

The app features one intricately detailed coral reef scene and twenty highly detailed 3D fish species with complex artificial intelligence, swimming behaviors, and appearance. Moreover, there is a bonus scene where two clownfish host a sea anemone, and you can play with and feed them.

In the bonus scene, you can choose from four different anemone species, and there are dynamic water and lighting effects, realistic anemone tentacles physics, and fluid simulation. You can interact with clownfish and their environment and feed them simply by tapping the screen. The fish stay sharp and clear even when they swim up close and fill the whole screen.