One-spot Eartheater

About

Found across a broad stretch of Amazonian blackwater and whitewater systems, Satanoperca lilith, sometimes called the one-spot eartheater or one-spotted demon fish, is a large, sand-sifting cichlid that remains genuinely uncommon in the hobby despite its wide natural range. Visually, it's best told apart from its close relatives by a single dark blotch on the flank combined with a well-defined ocellus at the upper base of the caudal fin. The similar S. daemon carries two flank blotches instead of one, which makes identification fairly straightforward when the fish are side by side. Like other eartheaters, this species spends much of its time working the substrate, sifting mouthfuls of sand for food, so a deep, fine-grained bottom is genuinely important for its long-term health. Behaviorally, S. lilith is far calmer than its genus name might suggest. Outside of spawning, it poses no threat to tankmates too large to swallow whole. It is, however, a social animal that does much better in groups of five or more. Keep too few and the dominant fish will make life miserable for subordinates. A roomy setup is non-negotiable for a group of adults, but the overall care demands are considered manageable even for relative newcomers to larger New World cichlids. Breeding has not been documented in aquaria but is expected to follow the biparental substrate-spawning pattern seen in closely related species.