Malawi sand diver
Fossorochromis rostratus
Also known as Sand diver, Rostratus, Malawi sand digger
Care at a glance
- Temperature
- 75–82°F (24–28°C)
- pH
- 7.8–8.6
- Adult size
- 11 in (28 cm)
- Minimum tank
- 119 gal (450 L)
- Temperament
- Mostly peaceful
- Social behavior
- Social
- Swim level
- Bottom
- Difficulty
- Medium
- Breeding
- Easy
- Rarity
- Common
- Origin
- Open sandy floors of Lake Malawi in East Africa, away from heavy rock.
- Family
- Cichlidae
Overview
This big active fish needs a long tank of at least 450 liters with deep soft sand for sifting and diving. Water should be hard and alkaline at 24 to 28 C, pH 7.8 to 8.6. It is peaceful for its size and does best with other large calm Malawi cichlids in roomy tanks. Feed sinking pellets and frozen foods, and give it real sand rather than gravel to feed and behave normally.
In the wild
The sand diver lives over the wide sandy floors of Lake Malawi rather than in the rocks. It takes big mouthfuls of sand, sifts out insect larvae and small animals, and spits the clean grains back out. When startled it dives headfirst into the sand to hide.
Good to know
Fossorochromis rostratus is one of the largest sand dwelling Malawi cichlids and is a maternal mouthbrooder. Dominant males show a patchwork of blue and orange while females and young wear blotchy camouflage. Its habit of burying itself in sand gives the genus its name, which refers to digging.
Did you know
A frightened sand diver really does dive, plunging nose first straight into the sand and vanishing in an instant.
Where to buy
Some links may not be the exact species or variety.
…or ask your local fish store.
Appears in
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Related species

Nicaragua cichlid
Hypsophrys nicaraguensis9.8 in (25 cm)75 gal (285 L)73–82°F (23–28°C)
Star sapphire cichlid
Placidochromis phenochilus7.9 in (20 cm)79 gal (300 L)77–82°F (25–28°C)
Pearl eartheater
Geophagus brasiliensis11 in (28 cm)75 gal (284 L)68–79°F (20–26°C)
Deepwater hap
Placidochromis electra7.1 in (18 cm)66 gal (250 L)75–81°F (24–27°C)
Xingu eartheater
Retroculus xinguensis9.8 in (25 cm)185 gal (700 L)79–86°F (26–30°C)Chisel-tooth cichlid
Cincelichthys bocourti11.8 in (30 cm)119 gal (450 L)77–82°F (25–28°C)
