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In Kalymnos, only 18% of the steep volcanic land could be cultivated, so the main occupations were trading, boat building and sponge fishing, which perhaps was the oldest occupation on the island. Diving for sponges brought social and economic development to the island: the freediving method was originally used.
Sellers of chapbooks were chapmen; compare the term stationer which described a bookseller (usually near a university) whose shop was fixed and permanent. In Russia a Khodebshchik ( Russian : ходебщик ) was a person carrying a billboard advertising a product or service, a street hawker or peddler of wares, or house-to-house salesman in ...
Keratosa, the keratose sponges or horny sponges, is a subclass of demosponges. [2] Keratosa sponges are nonspicular demosponges with organic spongin fibers forming flexible skeletons. [3] [4] Recently discovered in the Andaman and Nicobar Islands, these sponges contribute to reef structures in tropical regions. [5]
Bath sponges can be defined as any sponge species possessing only spongin fibers – which are springy fibres made from collagen protein. [ 7 ] Commercial uses for bath sponges range from cosmetic , bath, or industrial purposes, with the quality of the sponge based on analysing the quality of the sponge skeleton, with those possessing soft ...
They sell a wide range of goods such as fish, fruits, vegetables, clothes and books. In suburban areas, they go door to door; in more commercial areas, they usually have stands or lay their goods on the ground. In the afternoon, many of them sell commercial goods in the more crowded parts of the cities, and at night, they sell juices, tea and ...
Cliona celata, occasionally called the boring sponge, is a species of demosponge belonging the family Clionaidae. [1] It is found worldwide. This sponge bores round holes up to 5 millimetres (0.20 in) in diameter in limestone or the shells of molluscs, especially oysters. The sponge itself is often visible as a rather featureless yellow or ...
Callyspongia (Cladochalina) aculeata, commonly known as the branching vase sponge is a species of sea sponge in the family Callyspongiidae. [1] Poriferans are typically characterized by ostia, pores that filter out plankton, with an osculum as the opening which water leaves through, and choanocytes trap food particles.
Neofibularia nolitangere is a massive sponge often growing to about 30 centimetres (12 in) wide and 30 centimetres tall but sometimes reaching 1 metre (3 ft 3 in) in width. It has a central cavity or atrium with thick walls.