| Species | Name Used |
|---|---|
| Tonna galea (Linnaeus, 1758) | Tonna galea (p. ) |
| Tonna perdix (Linnaeus, 1758) | Tonna perdix (p. ) |
| Trivia arctica (Pulteney, 1799) | Trivia arctica (p. ) |
| Trivia monacha unspecified | Trivia monacha (p. ) |
| Trochus erithreus Brocchi, 1821 | Infundibulops erythraeus (p. ) |
| Trochus intextus Reeve, 1848 | Trochus intextus (p. ) |
| Turbo bruneus (Röding, 1798) | Turbo bruneus (p. ) |
| Turbo chrysostomus Linnaeus, 1758 | Turbo chrysostomus (p. ) |
| Turbo petholatus Linnaeus, 1758 | Turbo petholatus (p. ) |
| Turbo tuberculosus Quoy & Gaimard, 1834 | Turbo tuberculosus (p. ) |
| Turritriton labiosus (Wood, 1828) | Turritriton labiosus (p. ) |
| Tutufa oyamai Habe, 1973 | Tutufa oyamai (p. ) |
| Umbraculum umbraculum (Lightfoot, 1786) | Umbraculum umbraculum (p. ) |
| Vasum muricatum (Born, 1778) | Vasum muricatum (p. ) |