Lake Rotoiti fished "way ahead" of normal on opening day, going by Fish & Game's surveys of hundreds of anglers who turned out for the start of the new fishing season.
The new season for lakes Tarawera, Okataina and Rotoiti, which close for three months over winter, began on October 1 in warm sunny conditions.
Eastern Fish & Game has released some early findings from interviews with around 800 anglers who were spoken to, mainly as they returned to boat ramps.
Staff and volunteers, including University of Waikato postgraduate students and Department of Conservation officers, measured and weighed more than 760 fish - some tipping the scales at more than 5kg.
Eastern Fish & Game officer Matt Osborne said Lake Rotoiti "performed really well, way ahead of usual, with harvest rates up by as much as 20 per cent". Okataina also fished well on opening day.