Aequidens diadema

The Royal Acara, also known as the Diadem Cichlid, is a stunning fish named for the crown-like pattern of iridescent spots on its head. Originating from the slow-moving blackwaters of South America, it brings a regal presence to any large home aquarium. As an adult, it can grow quite large, so a spacious tank is essential to give it the room it needs. While not overly aggressive, it is territorial and will claim a section of the tank as its own, so it's best housed with other robust, similar-sized fish. Small, timid tank mates should be avoided. This fish is relatively hardy but does best in soft, slightly acidic water that mimics its natural habitat. For decorations, use sand as a substrate, as they love to dig and forage for food. Add pieces of driftwood and smooth rocks to create hiding places and visual barriers, which helps reduce stress. The Royal Acara is an omnivore and not a picky eater. A balanced diet of high-quality cichlid pellets, supplemented with frozen or live foods, will keep it healthy and vibrant. Because it digs, be sure to use hardy plants like Anubias or Java Fern tied to decor, or simply opt for floating plants. It's a great choice for an aquarist ready to manage a larger, personality-filled cichlid.