The 15-week-old triplets get their first swimming lesson from their mum, Bonita, and dad, Manu. The two boys, Uca and Yali, are named after an area of the Amazon rainforest and the second largest region in Peru. The female pup is named Yara, which means ‘river spirit’ in Brazilian folklore. Endangered giant otters face an uncertain future as conservationists estimate that only a few thousand remain across South America. The pups have been born as part of the international conservation breeding programme in European zoos that is working to safeguard them from extinction