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  2. Aquarium - Wikipedia

    en.wikipedia.org/wiki/Aquarium

    A freshwater aquarium with plants and various tropical fish. An aquarium ( pl.: aquariums or aquaria) is a vivarium of any size having at least one transparent side in which aquatic plants or animals are kept and displayed. Fishkeepers use aquaria to keep fish, invertebrates, amphibians, aquatic reptiles, such as turtles, and aquatic plants.

  3. Self-cleaning surfaces - Wikipedia

    en.wikipedia.org/wiki/Self-cleaning_surfaces

    A) A superhydrophobic surface with a high contact angle nearing 180 degrees. B) A surface with a low water sliding angle. C) A surface with a higher sliding angle which will be less efficient when self-cleaning water from its surface. Control over surface wettability is a critical aspect of self-cleaning surfaces.

  4. Bluestreak cleaner wrasse - Wikipedia

    en.wikipedia.org/wiki/Bluestreak_cleaner_wrasse

    Bluestreak cleaner wrasses clean to consume ectoparasites on client fish for food. The bigger fish recognise them as cleaner fish because they have a lateral stripe along the length of their bodies, and by their movement patterns. Cleaner wrasses greet visitors in an effort to secure the food source and cleaning opportunity with the client.

  5. Conservation and restoration of shipwreck artifacts - Wikipedia

    en.wikipedia.org/wiki/Conservation_and...

    The cleaning process of metals depends on the level of corrosion, oxides, and/or marine organism (limpets, molluscs, calcareous, etc.) accumulation on the metal's surface. There are several methods such as sandblasting and electrolytic reduction, including other methods done mechanically and chemically.