| Families/Species | N. | De | D. | Length (mm) | |||||
| 1 | 2 | 3 | Org./m2 | Min. | Max. | Ave. | Sd. | ||
| BIVALVIA | |||||||||
| MYTILIDAE (Rafinesque, 1815) | |||||||||
| Brachidontes adamsianus (Dunker, 1857) | 24 | 650 | 4 | 13.56 | W | 2.16 | 13.8 | 5.87 | 1.26 |
| Brachidontes semilaevis (Menke, 1849) | 2 | 0.04 | I | 5.32 | 6.1 | 5.71 | 0.55 | ||
| Choromytilus palliopunctatus (Carpenter, 1857) | 725 | 14.5 | I | 4.9 | 56 | 17.2 | 7.7 | ||
| ISOGNOMONIDAE (Woodring, 1925 (1828)) | |||||||||
| Isognomon janus Carpenter, 1857 | 92 | 1.84 | I | 5.6 | 30.9 | 15.7 | 5.4 | ||
| OSTREIDAE (Rafinesque, 1815) | |||||||||
| Crassostrea palmula (Carpenter, 1857) | 1 | 0.02 | I | 24.4 | 24.4 | 24.4 | - | ||
| Crassostrea prismatica (Gray, 1825) | 1 | 0.02 | I | 48.9 | 48.9 | 48.9 | - | ||
| CHAMIDAE (Lamarck, 1809) | |||||||||
| Chama (chama) coraloides Revee, 1846 | 21 | 41 | 1.24 | R | 6.89 | 46.6 | 21.5 | 8.85 | |
| Chama mexicana Carpenter 1857 | 38 | 2 | 0.8 | R | 5 | 38.1 | 16.3 | 8.05 | |
| POLYPLACOPHORA | |||||||||
| ISCHNOCHITONIDAE (Dall, 1889) | |||||||||
| Ischnochiton (I.) muscarius (Reeve, 1847) | 108 | 4 | 2.24 | R | 3.71 | 21.1 | 11.5 | 3.73 | |
| Stenoplax (S.) limaciformis (Sowerby & Broderip 1832) | 3 | 0.06 | I | 8.53 | 29.9 | 16 | 6.3 | ||
| Stenoplax (S.) regulata (Sowerby, 1832)) | 1 | 0.02 | I | 5.33 | 5.33 | 5.33 | |||
| CALLISTOPLACIDAE (Pilsbry, 1893) | |||||||||
| Callistochiton elenensis (Sowerby, 1832) | 4 | 0.08 | I | 4.79 | 6.3 | 5.29 | 0.87 | ||
| Callistoplax retusa (Sowerby in Broderip & Sowerby, 1832) | 1 | 0.02 | I | 7.12 | 7.12 | 7.12 | |||
| CHAETOPLEURIDAE (Plate, 1899) | |||||||||
| Chaetopleura (C.) hanselmani (Ferreira, 1982) | 1 | 1 | 0.04 | R | 8.58 | 8.58 | 8.58 | ||
| Chaetopleura (C.) lurida Sowerby in Broderip & Sowerby, 1832) | 1 | 0.02 | I | 6.8 | 6.8 | 6.8 | |||