And the winners were announced this weekend in a special awards ceremony in the elephant and giraffe house.
The overall winner was a strangely ethereal image of an adult Francois langur pictured with its infant. First place awards also went to Bruce Marshall for an image of two Sumatran tigers, Matthew Allen, who captured the Francois langur on film, and 14-year-old Fiona Beattie for her striking picture of a crowned pigeon.
Alan Dodridge won an award for a witty picture of an African pigmy goat facing off against a black and white ruffled lemur as both teetered on top of a fence, and Deirdre Corrigan won her category with a picture of a little boy, Ethan, practising his chimpanzee moves.
Zoo manager Mark Challis said there were more than 350 entries. "Even though the competition has been running for more than 30 years, we are always astounded by the quality and skill demonstrated each year," he said.
"It is also wonderful to see which subjects the photographers have chosen and the competition certainly highlights the beauty and diversity of the species that we care for.
"I would like to thank everyone who took part in the competition and also congratulate our winner and all entrants on their 'zooper' photographs."