Everyone has seen at least in a photo the unique beaches of the Hawaiian Islands, which have become a household name for clean streaks of white sand. Few have asked what this beauty is due to, reports NOVA.
The reason lies in the excrement of parrot fish. It feeds on dead corals. The digestive tract of this fish is strange – she has no stomach, but she has a very strong chewing apparatus. After processing the food, the animal converts it into a white powder.
For a year, the parrot fish produces 380 kg. sand. In addition, it cleans the coast from dead corals.