It was the busiest day on record. Official whale watchers at Cape Solander at Botany Bay had spotted 107 giants in June, 2015, trumping the previous record of 103.
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At the time, local whale expert Geoff Ross was part of a team volunteers which had been tracking the humpback migration for 18 years.
In their first year, 1997, they saw only 24.
Its been an enormous recovery, Mr Ross said. When I was a kid and through the 1960s, 1970s and 1980s no one would ever see a whale.
It really is one of the success stories of the conservation movement.
Mr Ross said the 2015 count suggested numbers had been rising about 10 to 14 per cent over the previous decade.
Send you whale watching photos to news@theherald.com.au