Sulawesi Sailfin Lizard

The Sulawesi black sailfin lizard (Hydrosaurus celebensis) belongs to agamid native to Indonesia. It is the second-largest species of sailfin dragon, with only the Sulawesi giant sailfin dragon being larger, exceeding 1.00 m in total length, possibly 1.200 m. Its head, neck, gular region, and shoulder are completely black. a row of enlarged flat, sometimes conical scales occurs on either side of the neck. its nuchal and dorsal crests are continuous. few (<10) additional enlarged scales exist roughly at midbody and before the hind limbs. (Wikipedia, general species account).

Dorsal colouration of this lizard is typically yellowish, sometimes dark orange, interspersed with black spots. ventrally it is beige, and its limbs are black with a few yellow spots. the scales under fourth and fifth toes are broad with several keels from near the base of the toe. the tail is black, sail black, or dark violet with black stripes. a group of dirty white, enlarged, flat scales are seen on the anterior part of the dorsum. (Wikipedia, general species account).