#aquaristics

• Aquarium unit — A rare neologistic term or stylistic variant occasionally used to designate a large modern aquarium or a structural component of a complex aquaristics system designed for the public exhibition of marine life; a borrowing partially adapted under the influence of Romance languages (such as Italian or Spanish). This word defines a technologically controlled aquatic environment simulating the natural habitat of exotic fish and plants.
• Fishkeeping — A passion, constant preoccupation, or hobby consisting of breeding, reproducing, and studying fish, plants, and other aquatic organisms in controlled artificial environments; a branch of miniature bio-ecosystems closely related to aquaristics. This structural discipline involves deep knowledge of water chemistry, the biological nitrogen cycle, and the ecological balance required for species survival in captivity.
• Aquaristics — An applied science, technique, and hobby dealing with the study, setup, management, and maintenance of captive aquatic ecosystems inside aquariums. This structural discipline brings together advanced knowledge of hydrochemistry, ichthyology, underwater botany, and filtration systems engineering, aiming to faithfully replicate natural biotopes and conserve species under optimal conditions.
• Aquarium — A tank, reservoir, or container with transparent walls (made of glass or plastic), filled with fresh or salt water, equipped with special filtration, lighting, and oxygenation installations, used for breeding, displaying, and studying fish, plants, and other aquatic organisms; it can also designate a large-scale public institution dedicated to showcasing marine fauna. This structural environment simulates the species' natural biotope under controlled conditions.
• Fishkeeping variant — A rare, neologistic, or erroneous phonetic variant occasionally used in hobbyist jargon instead of 'acvariofilie', designating the passion for setting up aquariums, as well as breeding exotic fish or plants in controlled artificial tanks. This structural term symbolically reunites the element 'acva-' (water) with the attraction for captive submerged ecosystems.
• Airlift — A technical installation, pump, or device based on the principle of pneumatic transport, used to lift a liquid or a mixture of water and sediments through a vertical pipe by injecting compressed air at the base. This system is widely used in aquaristics for water filtration, in petroleum engineering, and in dredging operations due to the absence of moving mechanical parts.
• Aponogeton — The sole genus of aquatic plants in the monocotyledonous family Aponogetonaceae, native to the tropical and subtropical regions of Africa, Asia, and Australasia, characterized by submerged rhizomes or tubers and spike-like inflorescences raised above the water surface. Many species are highly prized in aquaristics due to the exquisite decorative appearance of their crinkled, wavy, or lace-like submerged leaves.
• Aponogeton crispus — A species of perennial aquatic plant in the genus Aponogeton, native to the wetlands and streams of Sri Lanka, characterized by translucent, light-green or brownish submerged leaves with heavily wavy and crinkled margins; widely used in freshwater aquaristics. It is prized for its relatively high adaptability in aquariums compared to other species in the family, developing solitary white or yellowish spike-like inflorescences that rise above the water surface.
• Aponogeton fenestralis — An archaic scientific name or major taxonomic synonym for the species Aponogeton madagascariensis, a famous perennial aquatic plant endemic to Madagascar, commonly known as the Madagascar lace plant. It is globally renowned due to the unique skeletonized morphology of its submerged leaves, which almost entirely lack mesophyll tissue between the veins, leaving a spectacular geometric, net-like lace pattern.
• Aponogeton henkelianus — An archaic scientific name or important taxonomic synonym for a rare variety of the species Aponogeton madagascariensis, an aquatic plant endemic to Madagascar, commonly known as the broad-leaved lace plant. It is distinguished by its large fenestrated leaves with an irregular network of veins and fine geometric perforations, being a particularly demanding plant in aquarium cultivation.