Cá Trong
Not independently attested in Vietnamese folklore or academic sources: no collection records a fish spirit or water deity named 'Cá Trong'; the guardian-of-fish-stocks account is generic AI-template prose. Vietnam's attested fish legends centre on the carp that leaps the Dragon Gate, on Cá Ông, the whale-god of coastal fishing villages, and on the folk painting Lý ngư vọng nguyệt.