The range runs into the Saruwaged Range to the east and together they form a natural barrier between the Ramu and Markham valleys to the south and Vitiaz Strait to the north.
It is commonly found in the Markham, Ramu, and Sepik Rivers; their preferred habitat includes clear rainforest streams, swamps, pools, and lagoons abundant in vegetation and submerged logs.
The Saruwaged Range runs into the Finisterre Range to the west and together they form a natural barrier between the Ramu and Markham valleys to the south and Vitiaz Strait to the north.
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