An opera, first published in 1823:
https://www.jpc.de/jpcng/classic/detail/-/art/der-taucher-oper-in-zwei-akten/hnum/11765624
Audio samples here:
https://www.carus-verlag.com/musiknoten-und-aufnahmen/conradin-kreutzer-der-taucher-8353600.html
We're in Weber territory here, I'd say.