The Singapore 1977 Sea Shells and Marine Life Definitives stamp set features a vivid, coloured collection highlighting the diverse marine life and shells found within Singapore's regional ecosystem. The Seas Shells were depicted for the Low Values Definitives while the Marin Life was depicted for the High Values Definitives.

Definitives Low Values -- Lyrate Cockle(1¢), Folded Scallop (5¢), Marble Cone (10¢), Scorpion Conch (15¢), Amplustre Bubble (20¢), Spiral Babylon (25¢), Regal Thorny Oyster (35¢), Winged Frog Shell (50¢) and Troschel’s Murex (75¢).

Definitives High Values – Spotted Hermit-crab ($1), Stingray ($2), Cuttlefish ($5) and Lionfish ($10).