The abalone fruit is the seed of Brazilian chestnut (not fruit, so it is only suitable for eating dried fruit). Brazil chestnut, also called Brazil nut, is produced in the tropical rain forest of Brazil. The plant is a big tree with a height of 30-45 meters and a trunk diameter of 2 meters. It is one of the largest trees in the Amazon rainforest, with a tree age of more than 500 years. The bark is gray and slippery, the trunk is straight and the wood is excellent. Deciduous plants, leaves will fall off in dry season, simple leaves, alternate leaves, whole leaf margin or obtuse serrations, long elliptic leaves, length of 20-35cm, width of 10- 15cm, wavy, sharp tip, whorled, short stalks, small flowers, white and green, inflorescences are panicles, inflorescences are 5-65cm. Every flower has two parts: calyx and corolla. Calyx is falling calyx, corolla has six petals, and petals are cream. Stamens are numerous. The capsule is spherical, brown, with a diameter of 10- 15cm, and a wooden hard shell weighing about 2 kg. Each fruit has 12-24 seeds, its cross section is triangular (similar to abalone) and its inner core is white. It is native to Guyana, Venezuela, Brazil, eastern Colombia, eastern Peru and eastern Bolivia in South America. Scattered in the forests along the Amazon, Negro and Orinoco rivers.

Brazil chestnut will bear fruit only if it grows in the virgin forest. It is not that there is usually a lack of an orchid in the virgin forest, but that this orchid will indirectly affect the pollination and fruiting of Brazilian chestnut. This orchid will give off a smell that attracts drones, and drones will use this smell to attract females to mate. Without this orchid, male bees and female bees would not mate, resulting in a decrease in the number of bees. The decrease in the number of bees will make the flowers of Castanea brasiliensis unable to complete pollination and fruiting. If there are both orchids and bees in the forest, the flowers of Castanea brasiliensis can be pollinated smoothly, and it takes 14 months for the fruit to mature after pollination. There is a lignified hard shell outside the fruit, the shell thickness is about 0.8- 1.2 cm, and there are 8-24 seeds in it, which are triangular and 4-5 cm long. When the fruit is ripe, it will fall to the ground. Because the tree is very tall, the fruit can fall to the ground at a speed of 80 km/h in 3 seconds, and its shell is hard and heavy enough to smash the animal's skull when it falls to the ground.

Bowfish fruit is a kind of dried fruit, which looks like abalone, hence the name. Rich in nutrition. "abalone fruit" is produced in the United States, and also in Fujian and Taiwan Province provinces of China. "abalone fruit", also known as desert fruit, is produced in desert areas and Xinjiang, China. The Chinese names of abalone fruit are Brazil chestnut, Brazil fruit, Brazil fruit and abalone fruit, which are native to Guyana, Venezuela, Brazil, eastern Colombia, eastern Peru and eastern Bolivia in South America. Abalone is crispy and nutritious. In addition to protein, fat and carotene, nuts are also rich in vitamin B 1, vitamin B2 and vitamin E. Nuts also contain eight amino acids needed by human body, among which the contents of calcium, phosphorus and iron are higher than other nuts. Most importantly, the content of magnesium and selenium in abalone fruit is much higher than that in ordinary food. Eating abalone fruit for a long time can not only strengthen the brain, but also prevent the brain from aging, which has a good nourishing effect on people who are weak, weak after illness and prone to hunger.