Diving

The triliteral root ghayn wāw ṣād (غ و ص) occurs in the Quran 2 times.

Underwater diving, as a human activity, is the practice of descending below the water's surface to interact with the environment. Immersion in water and exposure to high ambient pressure have physiological effects that limit the depths and duration possible in ambient pressure diving.

Sponge diving

Sponge diving is the oldest known form of the original art of underwater diving. Its purpose is to retrieve natural sponges for human use.

Most sponges are too rough for general use due to their structural spicules composed of calcium carbonate or silica. But two genera, Hippospongia and Spongia, have soft, entirely fibrous skeletons. These two genera are most commonly used by humans. It is unknown when exactly the sponge became an article of use. In Ancient Greek writings, Homer and Plato mentioned the sponge as an object used for bathing.

Kalymnos, (Greek: Κάλυμνος) is a Greek island and municipality in the southeastern Aegean Sea. Kalymnos is known and billed as the "Sponge-divers' island". Sponge diving has long been a common occupation on Kalymnos and sponges were the main source of income of Kalymnians, bringing wealth to the island and making it famous throughout the Mediterranean.

Pearl diving

Pearl diving is the act of recovering pearls from wild mollusks, usually oysters or mussels, in the sea or fresh water. Pearl hunting used to be prevalent in the Persian Gulf region and Japan, but also occurred in other regions.

For thousands of years, most seawater pearls were retrieved by divers working in the Indian Ocean, in areas such as the Persian Gulf, the Red Sea, and in the Gulf of Mannar (between Sri Lanka and India).

Solomon's divers

(21:82) From the devils are those who dive (Arab. يَغُوصُونَ, yaghūṣūna) for him, and they perform other tasks, and We were guardian over them.

(38:37) The devils, builders and divers (Arab. وَغَوَّاصٍ, waghawwāṣin).