Algae eaters are aquatic creatures that help control algae growth in aquariums by consuming various types of algae. Popular algae eaters include fish like Siamese algae eaters, otocinclus catfish, and plecos, as well as invertebrates like Amano shrimp, nerite snails, and mystery snails. Each species has different dietary preferences and tank requirements, so it's important to choose the right algae eater for your aquarium's size, water conditions, and existing tank mates. While they help keep algae levels in check, they should be supplemented with a balanced diet and regular tank maintenance for a healthy environment.