- Daily Times (New York) 1 n
- Dallorto 1
- Daly, R. A. 1
- Dampier, William 1
- Danube 1
- dark, the 1, 2
- Darling, Grace 1
- Darwin, Charles 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
- ‘Davy Jones’ 1
- Deacon, Margaret 1
- decommissioning 1
- decomposition 1, 2, 3, 4
- Deep Scattering Layer (DSL) 1, 2, 3
- density of seawater, maximum 1
- depths, record 1, 2, 3, 4, 5, 6, 7, 8
- Desceliers, Pierre 1
- Devil’s Is. 1, 2
- discards 1, 2, 3
- diving (free) 1, 2, 3
- dodo 1
- Dogger Bank 1, 2
- domestic animals, ecological damage by 1
- Doña Marilyn 1, 2
- Doña Paz 1, 2
- Donati, V. 1
- Donne, John 1
- Dougherty Is. 1
- Dover, white cliffs of 1
- Doyle, Conan 1, 2
- drift nets 1, 2, 3
- Dunwich 1
- Dutton, Thomas 1, 2, 3, 4 n
- dynamite (illegal fishing) 1, 2, 3