The Varanus beccarii, also known as the Black Pearl Lizard, is a medium-sized giant lizard. The body length is about 90-100 centimeters, and its characteristic color is completely black. The juvenile's chest is light green, and its tail is quite slender. The scales on the tail are arranged in a circular pattern. This species is a close relative of the emerald green giant lizard. A species that is completely arboreal, although its distribution area has little rainfall, the black tree monitor lizard needs to live in a high humidity environment, is timid and somewhat neurotic, and feeds on insects, reptiles, birds, and small mammals. Distributed in the Aru Islands west of Papua New Guinea. Residing in mangrove forests.