#animals

• Aquatic fauna — The totality of vertebrate and invertebrate animal species structurally adapted to live permanently or temporarily in aquatic environments (fresh, brackish, or marine waters). This ecological concept encompasses a diverse range from protozoa and crustaceans to fish, amphibians, and marine mammals, representing a fundamental indicator for assessing biotope quality and the health status of global hydrographic ecosystems.
• Artiozoans — A rare or historical scientific name used to designate a hypothetical taxonomic group or a phylum of invertebrate animals with perfect bilateral symmetry or evenly structured segments. In early evolutionary studies, the term characterized organisms whose internal and external organization conformed to a strict numerical geometry divisible by two.
• To self-feed — Regarding animals or livestock: to self-feed, to forage autonomously; to procure or consume feed directly from pastures, crops, or automated feeding systems without manual intervention or daily distribution by a handler.