Amazonas Magazine is a freshwater aquarium magazine. It is read by people who are passionate about keeping freshwater aquariums in their houses, offices, businesses, and schools. They pay $100 to $600 for an article, depending on the author’s experience, the length and the complexity of the article and whether it has images or not. First-time contributors are generally paid $100 to $300 per article, including images, which (frankly) seems rather low. For details, refer to this page.