Calvus

Altolamprologus calvus

Also known as: Pearly Compressiceps

A laterally flattened Tanganyikan predator that slips sideways into rocky crevices.

Water

Freshwater

Temperature

76–82°F

pH

7.8–9

Hardness

10–25 dGH

Max size

5 in

Min tank

40 gal

Temperament

Semi-aggressive

Social

Solitary

Swim level

Mid-bottom

Diet

Carnivore

Care level

Intermediate

Lifespan

8-10 years

Breeding

Cave spawner

Suitability

Common

Origin

Lake Tanganyika (Africa)

A slow, deliberate ambush hunter with an armored, compressed body for hiding in cracks. Peaceful toward fish too large to eat, but it will take small ones. Needs hard alkaline water and lots of rock.