Little Red Beta/Betta fish.
Free, comes with the tank and the decorations in the picture
Also included is a net for getting him out, a strainer to dump the rocks, and enough food for over a year.
His name is 대한 (Dae-Han), but I'm sure he wouldn't mind if you wanted to change it.
I bought him and all the equipment about 9 months ago.
Preferred pick up is in Haeundae.