Nutting Coconuts, Goa, Panaji, India

The meat in a green young coconut is softer and more gelatinous than that in a mature coconut—so much so that it is sometimes known as coconut jelly. When the coconut has ripened and the outer husk has turned brown, a few months later, it will fall from the palm of its own accord. At that time the endosperm has thickened and hardened, while the coconut water has become somewhat bitter.
When the coconut fruit is still green, the husk is very hard, but green coconuts only fall if they have been attacked by molds or other blights. By the time the coconut naturally falls, the husk has become brown, the coir has become drier and softer, and the coconut is less likely to cause damage when it drops, although there have been instances of coconuts falling from palms and injuring people, and claims of some fatalities. This was the subject of a paper published in 1984 that won the Ig Nobel Prize in 2001. Falling coconut deaths are often used as a comparison to shark attacks; the claim is often made that a person is more likely to be killed by a falling coconut than by a shark, yet such evidence as there is would suggest that the number of deaths due to falling coconuts is small.
A small number of writings about coconuts mention the existence of the coconut pearl. This is generally considered a hoax. Professor Armstrong, of Palomar College, says "most eyewitness records of coconut pearls cited in the literature are secondhand accounts that were not observed by the authors of these articles. There are a few firsthand, published accounts of pearls observed inside coconuts, but these have been shown to be fraudulent."