The Hortle's whipray (Pateobatis hortlei) is a little-known species of stingray in the family Dasyatidae, occurring in shallow estuaries and mud flats off southern New Guinea.

The underside of the disc is a distinctive bright yellow in color, sometimes with darker markings around the nostrils, mouth, and gill slits.

[1] The pectoral fin disc of the Hortle's whipray is heart-shaped and slightly longer than wide; the anterior margins are concave and converge on a highly elongated, narrowly triangular snout.

The underside is distinctively bright yellow, with a thin dark border around the disc margin and sometimes darker blotches around the nostrils, mouth, and gill slits.

[3] Reproduction is aplacental viviparous, with the females supplying their developing embryos with histotroph ("uterine milk"); the young are born at under 20 cm (7.9 in) across.

[3] This ray is also threatened by habitat degradation, from the large-scale destruction of mangroves, intensive mining activity, and river pollution.

While the Hortle's whipray remains common within its small range, the International Union for Conservation of Nature (IUCN) believes these factors have led to a population decline, and has assessed it as Near Threatened.