The following information was extracted from LINN's Stamp News, October 11, 2004 edition.

Aug. 10: Freshwater Fish,
3w, Carassius auratus;
12w, Tilapia nilotica;
140w, Ophiocephalus argus;
165w, Clarias gariepinus.
Designer, Kim Hae Yong; offset, Korea Stamp Corp.; 20,000 perf sets; 2,000 imperf set.

Technical Details Extracted from Stanely Gibbons:
Fresh Water Fish
4 se-tenant stamps:
Issue Date: 10 August 2004
Series: -
Colour: -
Printing: offset
Paper: -
Watermark: -
Gum: -
Stamp size: 45 x 36 mm
Se-tenant size: 110 x 140 mm
M/S size: -
FDC size: 230 x 160 mm
Perforation: perf & imperf
Designs: -
Format: -
Sheet: -
Stamp Quantity: 20.000(perf) each design
2.000(imperf) each design
M/S Quantity: -
FDC Quantity: 2.000
Designer: Kim Hae Yong
Designer FDC: -
Printers: -
First Day Postmark: -

Fresh-water fishes
3 won stamp: Carassius Auratus:
Its body colour is red and it lives in clean and warm water of 18-25 °C and is omnivorous and raise for ornament.
12 won stamp: Tilapia nilotica:
Its body length is normal 10-20cm, the biggest 30cm. The suitable temperature is 18-28 °C. As the omnivorous, it is full of vitality, and is enable to breed fish.
140 won stamp: Ophiocephalus argus:
Its body length is 40-50cm and is full of vitality. It lives under the ice in winter and in over 30 °Cwater in Summer. It tastes good and grow fast and also can breed.
165 won stamp: Clarias gariepinus:
Its length is normal 30-40cm, the biggest 100cm. It is round and long in figure and eats the small fish, lobster, warm, etc, acting in night only.