License, verbatimCC0
The Metropolitan Museum of Art: Open Access, Creative Commons Zero (CC0). Flagged isPublicDomain=true in the museum's own record.
Giovanni Battista Palumba. A triton family in the sea, with a mother and child seated on the back of a half-man, half-sea monster with a child blowing on a conch shell on his shoulders, 1500–1510. The Metropolitan Museum of Art.