Have you ever seen a "mini-mango" about the size of a loquat fruit?
These small fruits are produced when the embryo stops developing in the seed for some reason and the fruit does not enlarge sufficiently. Normally, when the embryo stops developing, the fruit falls off, but in rare cases, the fruit does not fall off, but remains small and ripe, and this is treated as a "mini-mango. Although there is no embryo, the tissue of the hard shell (endocarp) covering the seed remains, so it is not the same as the so-called “seedless grape”.