This mug is shaped like a half-human and half-crocodile head of the "Crocodile King" from Papua New Guinea. The reverse features a down-pointed full-body crocodile.
From Tiki Farm:
"'The Crocodile King' is a powerful being, one that is said to be part man and part reptile, 'existing' in the realm between myth and reality. He watches over the crocodiles of Papua New Guinea...as well as those who claim kinship with them. Is he real or a product of superstition? Only the crocodiles know for sure. Feel free to ask them. The Crocodile King measures 6 ¾” in height and holds 18 ounces. Designed for Tiki Farm by Anthony Carpenter, the total run in either glaze shown here is limited to 250 mugs per glaze ('Pippin Green' and 'Bamboo Ash')."