Owning a fish tank (aquarium) has many benefits, from adding an interesting piece to your decor to even improving you health. In fact, some scientific studies show that watching an aquarium can reduce stress levels, help lower blood pressure and improve overall mental health. And when they look as good as these 25 creative and unusual fish tanks from around the world the effects make sense. A note of caution with some of these designs: keep in mind that fish and other aquatic animals are living creatures that do have certain requirements necessary for their well-being such as sufficient amount of living space, clean water, appropriate temperature, food etc. Some of the following designs may look really cool and trendy but the little residents of the tanks may not share their owners´ elation.