Resembling a cosmic Angler fish, swimming in an ocean of colorful bright stars, Gum 10 (RCW 19) is an emission nebula located in the constellation Puppis.
Rarely imaged (probably as it's relatively dim & isolated, it forms part of a large 200 thousand solar mass molecular cloud related to the Pup OB3 association and the O7f III giant star HD 69464.
Gum 11 and NGC 2579 are two further emission nebulae in this region.
Imaged early this year in HaLRGB from a dark site in rural Victoria.
ASTROBIN