There is an extra layer on the outside of the coconut. The thick layer of coconut fibre (as seen in coconut matting) is hidden inside a solid, (and waterproof) final layer. This enables the seed to float across the ocean for months or years without spoiling the seed inside. This has enabled the coco de mer to colonise almost every island in the Pacific.
The other thing, special to some people, is that the shape is remarkably suggestive of a pair of naked female buttocks.
The Coco de mer
Coco De Mer
The largest type of seed in the world is the Coco de Mer.
Coco de Mer (Lodoicea maldivica) originates in the SeychellesSee link
The coco de mer is a fruit and thus a plant, which itself does not "eat". Yet, the encyclopedia of life (eol.org), however credible, remarks that the jelly-like flesh of the Coco de Mer fruit is edible.
landon
The seed of the Coco De Mer plant is unusual because it is the largest of the plant kingdom. It can weigh up to 45 pounds
Coco de mer
people in sri lanka only found coco de mer.
coco de mer
It contains the largest seed in the plant kingdom.
The coco de mer is a nut of the palm tree Lodoicea.