Fruits en masse

Great thing here in Colombia is that you can get a hold on fresh fruit from close to any street corner. There's always a vendor ready to supply you with sweets in any shape and color and the price is always very good too. Lulo, pineapple, mango, granadilla, uchuva, guanabana, carambola...
But what are these? I forgot to ask and can't figure out which one it is. They're small in size, smaller than a kiwi and the vendor continuously sprayed them with lime juice to keep them fresh.. Anyone knows?