The pectoral fin disc of the ocellated electric ray is heart- or trowel-shaped and slightly wider than long. A pair of large, kidney-shaped electric organs are visible through the skin on either side of the head. The small eyes are followed by smaller spiracles, which have seven to ten small, rounded projections on their rims. The snout is broadly rounded, with each nostril divided into two openings by a strut. Between the nostrils is a curtain of skin with a smooth to gently wavy posterior margin. The small mouth forms a transverse line; the edge of the lower jaw is scalloped, and when closed usually conceals the teeth. There are 14–16 tooth rows in each jaw. The small and pointed teeth become progressively longer and sharper towards the back, and are arranged in a quincunx pattern. Five pairs of small gill slits are present on the underside of the disc.