Scientific name: Mikrogeophagus altispinosus (My-crow-gee-oh-fayguss al-tiss-pin-oh-suss). Size: To around 8cm/3.2in. Origin: Bolivia and Brazil. Aquarium size: 60 x 40cm/24 x 16in footprint recommended; 70 l or more. Water requirements: 6–7.5ph, hardness below 10°H. Temperature: 22–28°C. Availability and cost: Less commonly available than M. ramirezi. Expect to pay in the region of £5–£6 per fish.