Sleeper

About

A remarkable ambush predator from Lake Malawi, Nimbochromis livingstonii has perfected one of the most unusual hunting strategies in freshwater fishkeeping. The fish plays dead. Lying motionless on the substrate with its mottled, blotchy coloration making it look convincingly like a decomposing fish. When curious smaller fish move in to investigate, they become the meal. Local people around the lake call it "Kaligono," loosely meaning "sleeper," a fitting tribute to this behavior. It is the only member of its genus found across both shallow and deeper water zones, and turns up in everything from muddy vegetated bays to rocky shorelines throughout Lake Malawi, the upper Shire River, and Lake Malombe. In the aquarium this sedentary species is actually quite peaceful toward anything too large to swallow, but it will absolutely prey on smaller mbuna and juvenile fish, so tankmates need to be chosen with care. Good companions include Frontosa, larger haplochromines, and other robust Rift Lake species. It does best kept alone or as a small breeding group. One male with several females. Breeding is challenging, as females are maternal mouthbrooders prone to spitting the clutch when stressed. A rewarding species for intermediate to experienced keepers who appreciate behavior over constant activity.