Police spoke to a man who had been swimming prior to the search, but exited the water before the search began.
Police confirmed there remained doubt whether he was the person or object spotted by witnesses, and decided not to fine or charge him but rather take an "educational" approach.
"Police did speak to this swimmer who is a local," a police spokeswoman said.
A Coastguard spokesman told Hawke's Bay Today the man was a regular and confident swimmer.
"There was a swimmer around the same timeframe as the call [from the witnesses] and he did make himself known to police," he said.
"We are confident that he was the person that was sighted."
He added there were sightings of seals in the ocean while they were conducting the search.
The Government has set clear boundaries on what you can and cannot do during level 4 lockdown.
That includes a ban on swimming, surfing, scuba diving, and any water-based activities with boats (sail or motor).