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| Category | Levels |
| Feeding mode | suspension feeding |
| surface deposit-feeding | |
| subsurface deposit-feeding | |
| photosymbiosis | |
| chemosymbiosis | |
| carnivory | |
| Substrate relationships | epifaunal |
| infaunal siphonate | |
| infaunal asiphonate | |
| semi-infaunal | |
| nestling | |
| boring | |
| Attachment mode | unattached |
| byssate | |
| cemented | |
| Mobility | immobile |
| mobile | |
| swimming | |
| Body Size | log2(√(shell length · height)) |
