| Polymastiidae | |
|---|---|
| |
| Polymastia invaginata | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Porifera |
| Class: | Demospongiae |
| Order: | Polymastiida |
| Family: | Polymastiidae Gray, 1867 |
| Genera | |
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See text | |
Polymastiidae is a family of demosponges found in oceans throughout the world. It is the only family in the monotypic order Polymastiida. A useful diagnostic characteristic of members of this family is the presence of numerous surface papillae although this feature is shown by some other sponges.