carassius auratus has 1 distinct synonym spread across 1 of its 1 sense. Each sense below keeps its own list, because a synonym belongs to a meaning and not to a word: swapping one sense's substitute into another sense's sentence is how a thesaurus makes writing worse. WordNet records no antonym for it — antonymy is a relation between word forms rather than concepts, so it is deliberately sparse.
Counts are distinct word forms across every sense. A synonym that appears under three senses is counted once here and shown three times below, under each sense it belongs to.
small golden or orange-red freshwater fishes of Eurasia used as pond or aquarium fishes
Synonyms, antonyms and the broader and narrower relations for carassius auratus come from Princeton University’s WordNet. Full sources and licences.