| Littorinadae | Littoraria scabra | 2050 | 0.80 | 3500 | 0.33 | 2775 | 0.42 |
| Melongenidae | Volema myristica | 600 | 0.23 | 1650 | 0.16 | 1125 | 0.17 |
| Muricidae | Cronia margariticola | 0 | 0 | 7400 | 0.70 | 3700 | 0.56 |
| Neritidae | Nerita planospera | 400 | 0.16 | 450 | 0.04 | 425 | 0.06 |
|
| Nerita chameleon | 0 | 0 | 9500 | 0.90 | 4750 | 0.72 |
|
| Nerita polita | 0 | 0 | 100 | 0.01 | 50 | 0.008 |
| Potamididae | Cerithidea cingulata | 249,250 | 96.97 | 290,000 | 27.35 | 269,625 | 40.93 |
|
| Terebralia sulcate | 4550 | 1.77 | 0 | 0 | 2275 | 0.35 |
|
| Terebralia palustris | 0 | 0 | 747,050 | 70.44 | 373,525 | 56.70 |
| Trochidae | Monodontia labio | 200 | 0.08 | 150 | 0.014 | 175 | 0.03 |
| Turbinidae | Turbo cinereus | 0 | 0 | 50 | 0.005 | 25 | 0.004 |
| Total |
| 257,050 |
| 1,060,500 |
| 658,775 |
|