The Waituna Lagoon is on the southern coastline of the South Island of New Zealand.

[1] The lagoon is an important habitat for resident and migratory birds with seventy three different species being recorded.

[2] The lagoon is largely unmodified by human activity but there are elevated nutrient levels, sedimentation and algal blooms with a fear that it may lead to eutrophication.

[3] Awarua Runaka, Department of Conservation and Environment Southland suggest that cutting an opening through the bar to the sea helps waituna to flush itself.

[4] Waituna Lagoon is a common fishing and game bird hunting spot.