Boaties are being asked to report any sightings of a humpback whale which is tangled in fishing line near the bottom of the South Island.
The Department of Conservation said a fishing vessel reported that the whale was near Knife and Steel Harbour between Big River and Waitutu River.
It was believed to have a craypot line wrapped around its pectoral fin and tail, which was trailing for 20 to 30 metres behind it.
Humpback whales migrate north to tropical waters at this time of year, and DoC said the whale could travel up the west or east coast of the South Island.
DoC ranger Mike Morrissey said any boaties who spotted the whale should not get close to it or do anything that would disturb or harass it.