Tropical Fish, issued by the Republic of Congo on November 28, 1961.
- (0.5F. and 3 F.) Double-lined flying fish (Fodiator acutus — formerly Elagatus bipinnulatus), designed and engraved by René Cottet
- (1F. and 2F.) Sloane's viperfish (Chauliodus sloanei), designed by Samson and engraved by René Cottet
- Gigantic telescopefish (Argyropelecus gigas), designed by Samson and engraved by René Cottet
- Long-finned dragonfish (Caulolepis longidens), designed and engraved by René Cottet





