| Class | Order | Family | Genus species | Images | Notes | Author | Char |
|---|---|---|---|---|---|---|---|
| Demospongiae | Astrophorida | Geodiidae | Sidonops neptuni | 10 | Also placed under genus Geodia. Large and thick, inverted tan cones, with furrows in the inner surface and scattered holes in the outer surface. Consistency very hard and tough, difficult to cut or tear. | (Sollas, 1888) | brown,cinnamon-tan,vase,tube,massive,hard,tough |
