How to Identify Jenkins' Whipray

To identify Jenkins' Whipray (Himantura jenkinsii), look at these key features.

Physical Characteristics

Body shape

flat

Coloration

Dorsal surface typically light brown to greyish-brown, often adorned with numerous small to medium-sized dark spots or ocelli, which can be indistinct in some individuals. Ventral surface is white. The tail is dark, often with alternating light and dark bands towards the tip.

Scale type

placoid

Mouth position

inferior

Distinctive features

Large, oval disc, slightly wider than long., Long, whip-like tail, typically 2-3 times the disc length, bearing one or more serrated venomous spines., Absence of dorsal fins., Small, widely spaced denticles (thorn-like dermal denticles) covering the dorsal surface, becoming more prominent towards the midline and tail base., Snout is broadly rounded to obtusely angular.

Dorsal fin

Absent

Tail fin

Long, whip-like, without fin folds, but with one or more venomous serrated spines.

Pectoral fin

Large, forming the disc.

Distinctive fins

Pelvic fins are small and rounded.

Identification Tips

1. 1

   Disc Shape and Coloration

   Look for a thick, oval disc that is light brown to greyish-brown, often with scattered dark spots or ocelli. The spots can be variable in prominence.

2. 2

   Tail

   Observe the tail, which is very long and whip-like, typically 2-3 times the disc length. It lacks fin folds but possesses one or more venomous spines near the base.

3. 3

   Dermal Denticles

   Feel or observe the dorsal surface for small, widely spaced, thorn-like denticles, particularly along the midline and towards the tail base. This can distinguish it from smoother-skinned rays.

4. 4

   Snout

   Note the broadly rounded to obtusely angular snout, which is not acutely pointed.

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