Jag är nu rätt säker på att det är Astyanax aeneus på grund av var filmen spelades in (Södra Mexico).
Mexico has three species of Astyanax. A. mexicanus in the North, A. aeneus in the southern portion, and A. altior on Yucatan. A. armandoi is likely a synonym of A. aeneus (the only difference is the fleshy lower lip, which many characids express under hypoxic conditions). In southern Central America you will also find A. nasutus and A. orthodus.
