Waihi Beach north of Tauranga has just reopened after a "little, wee'' one-metre shark sent most swimmers and surfers out of the water earlier this afternoon.
A club member sighted the shark just outside the safe swim flags and alerted lifeguards around 2pm, said Trust Waikato Waihi Beach Lifeguard Service patrol captain Eden Bray.
"We dropped the flags, got all the swimmers out of the water ... to have a wee look, and told all the surfers about it.''
Five people, adults and children, were swimming waist-deep nearby at the time.
Surfers "were not really alarmed'', Miss Bray said.