How to Identify Southern Stingray

To identify Southern Stingray (Hypanus americanus), look at these key features.

Physical Characteristics

Body shape

flat

Coloration

Dorsal surface typically ranges from olive-brown to dark brown, grey, or black, often with darker spots or mottling, providing camouflage against the seabed. The ventral surface is white or cream-colored, sometimes with darker margins.

Scale type

placoid

Mouth position

inferior

Distinctive features

Rhomboidal (diamond-shaped) disc, slightly wider than long., Long, whip-like tail, typically 1.5 to 2.5 times the disc length., One or more serrated, venomous spines located on the dorsal surface of the tail, usually about one-third of the way down from the base., Small, widely spaced eyes followed by larger spiracles., Mouth, nostrils, and gill slits are located on the ventral surface.

Dorsal fin

Absent (no true dorsal fin on the disc or tail)

Tail fin

Long, slender, whip-like, with a prominent venomous spine(s) and often a low dorsal and ventral fin fold near the tip.

Pectoral fin

Greatly expanded and fused to the head and body, forming the characteristic disc.

Distinctive fins

Pelvic fins are small and located at the posterior margin of the disc.

Identification Tips

1. 1

   Disc Shape

   Look for a distinctly rhomboidal (diamond-shaped) disc that is slightly wider than it is long, with broadly rounded corners.

2. 2

   Tail Length and Spine

   Observe the long, whip-like tail, which is significantly longer than the disc. The presence of one or more prominent, serrated spines on the dorsal surface of the tail is a key identifier and a safety concern.

3. 3

   Coloration

   Note the generally uniform brown, grey, or olive coloration on the dorsal side, often blending seamlessly with sandy or muddy substrates.

4. 4

   Snout

   The snout is relatively short and broadly rounded.

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