The Pacific degu (Octodon pacificus), also known as the Mocha Island degu, is a species of rodent in the family Octodontidae.

It is endemic to Mocha Island in Chile.

Its natural habitat is subtropical or tropical moist lowland forests.

[2] Like its close relative the common degu, the Mocha Island degu is diurnal (active during the day).

[3] This species is said to have relatively primitive octodontid features,[2] including long fur and a tail lacking a substantial tuft,[2] a feature common amongst other octodons.