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Sandfish (Scincus scincus)

ReptileLizardSkinkDesert

Sandfish skink (Scincus scincus), a smooth-scaled desert lizard with a wedge-shaped snout.

Sandfish skink (Scincus scincus), Egyptian desert.

Image: Hatem Moushir, CC BY-SA 4.0, via Wikimedia Commons.

Overview

The sandfish (Scincus scincus) is not a fish at all — it is a skink, a kind of lizard, that earns its name by “swimming” through loose desert sand. Smooth-scaled and streamlined, it dives below the surface and moves through the sand with side-to-side, almost fish-like undulations of its body.

Its build is finely tuned for life in sand: a wedge-shaped, shovel-like snout, a countersunk lower jaw, smooth low-friction scales, a streamlined body, and fringed or flattened toes that help it push through loose grains. It lives in the sandy deserts of North Africa and the Arabian Peninsula.

By burying itself, the sandfish escapes the searing surface heat and the eyes of predators, and it can detect the vibrations of prey moving above.

Habitat & Range

The sandfish lives in arid deserts with loose, wind-blown sand — including dune fields — across North Africa (such as the Sahara) and the Arabian Peninsula. Fine, soft sand is essential, since the lizard depends on being able to dive into and move through it.

Diet

Sandfish are insectivores and small-invertebrate hunters, feeding on beetles, ants, larvae, and other small prey. They detect prey moving on or just under the surface by the vibrations it makes, then burst out of the sand to seize it.

Behavior

The sandfish spends much of its time buried, sheltering from extreme desert temperatures and predators beneath the surface. To move through the sand it tucks its limbs against its body and wriggles with rhythmic, wave-like motions of its trunk and tail — a behaviour often described as “sand-swimming.” It surfaces to bask and forage when conditions are right, and dives back under at the first sign of danger or heat.

Human Interaction & Conservation

The sandfish is harmless to people and is sometimes kept as a hardy desert pet and studied by scientists interested in how animals move through granular materials. It is not generally considered threatened, though desert habitats can be disturbed by human activity. Consult the IUCN Red List and regional authorities for current status.

More photos of the sandfish

A sandfish skink showing its countersunk lower jaw and smooth body.

Sandfish skink (Scincus scincus).

Image: HTO, CC0, via Wikimedia Commons.

Frequently Asked Questions — Sandfish

Is the sandfish actually a fish?
No. Despite the name, the sandfish is a lizard — specifically a skink (Scincus scincus). It is called a 'sandfish' because of the way it appears to swim through loose sand.
How does the sandfish 'swim' through sand?
It dives beneath the surface, folds its legs against its body, and undulates its trunk and tail in side-to-side, wave-like motions — much as a fish swims through water — to push itself through the loose grains. Its smooth scales, wedge-shaped snout, and fringed toes all help.
Why does the sandfish bury itself?
Burying lets the sandfish escape the extreme heat of the desert surface and hide from predators. Below the sand it is cooler and safer, and it can sense the vibrations of prey moving overhead.
Where do sandfish live?
They inhabit sandy deserts and dune fields of North Africa and the Arabian Peninsula, where soft, loose sand allows them to dive and move beneath the surface.

Sources and further reading

Authoritative wildlife references used for general educational context. Conservation status should always be verified against current IUCN Red List data. External links open in a new tab.