Pike Characin

About

The pike characin (Acestrorhynchus microlepis) is a torpedo-shaped predator from the Amazon and Orinoco basins, also found throughout the river systems of Guyana, Suriname, and French Guiana. In the wild it favors slow-moving black and clear water habitats, streams, lagoons, and quiet off-channel areas connected to larger whitewater rivers, where it prowls over silty or sandy substrate. Its body is built for speed and ambush, and it's almost exclusively a fish-eater, though it will take insects when prey fish become scarce during dry periods. A small dark spot just behind the gill cover and a round black blotch at the caudal fin base are the key field marks that separate this species from close relatives in the genus. Despite the aggressive label, pike characins are workable in a large community as long as tankmates are too big to be eaten. Peaceful cichlids like Geophagus, mid-sized catfishes, and larger characids are all reasonable companions. Juveniles school quite readily, and even adults do better in groups of four or more. One critical caveat: individuals should be kept at similar sizes, as cannibalism is a real risk when there's a noticeable size gap. The tank needs to be genuinely large, and this fish is not one to underestimate at full size.