Members of the public were able to share in a special moment with Rainbow Springs.
Rainbow Springs welcomed 200 giant kokopu (galaxias argenteus) to the park last Thursday, with visiting children invited to help transfer the fish into the pool.
Giant kokopu are the largest adult fish of New Zealand's whitebait species, endemic to New Zealand and classified as endangered.
Rainbow Springs' business manager David Hennigan says projects like this are vital for the future of New Zealand's endangered species.
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Rainbow Springs in Rotorua celebrating 85 years
Two rare whio ducks arrive at Rotorua's Rainbow Springs