#acvariu
- 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.
- 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.
- Anacharis — A Latinized form or adapted spelling variant of the botanical genus Anacharis (currently classified as Elodea), grouping higher, perennial, and completely submerged aquatic plants. Characterized by long, fragile stems and whorled leaves, this structural organism is recognized for its exceptional photosynthetic capacity and adaptability, frequently used in laboratory experiments to study plant physiology and in aquaristics.
- Anubias — A genus of aquatic and semi-aquatic perennial plants, native to the tropical regions of West Africa, belonging to the Araceae family; they are highly prized in aquaristics due to their tough, leathery, deep green leaves, and their unique ability to grow attached to hardscapes like rocks or driftwood via a robust rhizome.
- Anubias congensis — A distinct species of aquatic plant within the Anubias genus, native to the Congo River basin, characterized by elongated, lanceolate, large leaves oriented vertically on long petioles; it is a robust, slow-growing plant, excellently adapted to low-light aquatic environments.
- Anubias nana — The most popular and widespread dwarf species of aquatic plant within the Anubias genus, characterized by compact dimensions, short stems, and thick, glossy, dark green ovate leaves; due to its exceptional hardiness and slow growth rate, it is the benchmark species in aquascaping for decorating foreground and midground areas.
- Bacopa amplexicaulis — The scientific name of a perennial aquatic plant species in the genus Bacopa, characterized by erect stems and fleshy, ovate leaves that partially clasp the stem (amplexicaul). Also known by its synonym Bacopa caroliniana, this structural plant is highly popular in the aquarium hobby due to the aromatic lemon scent emitted by crushed leaves and its high resilience in intensely lit tanks.