Definitions

1. noun

A type of characin fish found in South America, also a genus of extinct fish

“The aquarium is home to a unique Astyanax, one of the rarest fish species in the world.”

2. proper noun

A son of Tantalus in Greek mythology, known for being cast into the River Euphrates after being dropped by Apollo

“In Greek mythology, Astyanax, the son of King Priam, was a key figure in the story of the fall of Troy.”