Hiatavolva rugosa
This is not nudibranch or sea slug

Photographed by: Angelo de Faveri
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Prosobranchia |
| Order: | Sorbeoconcha |
| Family: | Ovulidae |
| Species: | Hiatavolva rugosa |
Comment from Scott Johnson on photo #28548
This looks like prosobranch in the family Ovulidae. Probably something like Hiatavolva rugosa, although I can't be certain.Locality:
- Indonesia
- Bali (2) May
- Myanmar
- Mergui Archipelago (1) Apr