Species: H. walga
The dwarf whipray has a maximum length of 45 cm (18 in). The disc width is commonly about 24 cm (9 in). In outline it is oval with a bluntly-pointed snout. The whip-like tail is longer than the body and lacks the skin fold found in some related species. Females have a shorter tail than males, with a bulbous tip, and both sexes have four to six erectile, venomous spines at the base of the tail. The dwarf whipray is a uniform pinkish or beige colour. It is the small stingray, a cartilaginous fish in the family Dasyatidae.
he dwarf whipray reaches maturity at a length of about 17 cm (7 in). Mating occurs when the male grasps the female with their ventral surfaces in contact. This fish is viviparous, giving birth to one or two young at a time. The gestation period is not known, but before birth, the pups are fed on secretions from the uterine wall, a process known as histotrophy.
It is a demersal fish and is found over the continental and insular shelf of the west central Pacific Ocean. Its range extends from Thailand, Cambodia and Vietnam to Singapore, Malaysia, the Philippines and Indonesia. It occurs close to the sandy seabed on the inner continental shelf at depths usually less than 50 m