Happy tourists visiting the wildlife park in Japan might have thought they were treating the monkeys.
But they have left many of them so overweight they can hardly get around.
DON'T 'ave a banana: Macaca mulatta monkeys at Ohama park in Japan are grossly overweight
This chunky monkey is among about 50 that have alarmed the park's overseers
bout 50 Macaca mulatta monkeys at Ohama park in Sakai, Osaka Prefecture have been so overfed by tourists they are now massively overweight.
A local report in April said that about 30 per cent of the animals are so huge they struggle to get around their 420-square-meter enclosure.
Officials have been forced to put them on a strict diet.
A healthy Macaca mulatta monkey weighs about 20lbs, but one of these chunkies is over 4st.
The monkeys usually weigh around 20lbs, but one at the park is a whopping 4 1/2 stone
Don't feed the animals: Visitors to the park are being asked not to throw bananas to the obese monkeys