Polymastia is a genus of sea sponges containing about 30 species. These are small to large encrusting or dome-shaped sponges with a smooth surface having many teat-shaped projections (papillae). In areas of strong wave action, this genus does not grow the teat structures, but instead grows in a corrugated form.
Halichondria is a genus of sea sponges belonging to the family Halichondriidae. These are massive, amorphous sponges with clearly separated inner and outer skeletons consisting of bundles of spicules arranged in a seemingly random pattern.
Axinella is a genus of sponges in the family Axinellidae. Species of Axinella occur in the Indian and Pacific Oceans. Most of these sponges are smaller than 20 cm, and have a yellow or orange colour.
Hymeniacidon is a genus of sea sponges in the class Demospongiae. Some members of the genus are known to be mobile, achieving speeds of between 1 and 4 mm per day.
Stelletta is a genus of sea sponges belonging to the family Ancorinidae.
Clathria is a genus of demosponge in the family Microcionidae.
Echinoclathria is a genus of demosponge in the family Microcionidae.
Biemna is a genus of sea sponges in the family Biemnidae.
Haliclona is a genus of demosponges in the family Chalinidae.
Ircinia is a genus of sea sponges in the family Irciniidae.
Amphimedon is a genus of sponges with over 60 described species. In 2009, Amphimedon queenslandica was the first species of sponge to have its genome sequenced.
Callyspongia is a genus of demosponges in the family Callyspongiidae.
Callyspongiidae is a family of sea sponges in the order Haplosclerida. It contains the following genera and species:
Xestospongia is a genus of sponges in the family Petrosiidae. It contains the following species:
Neopetrosia is a genus of marine petrosiid sponges. It was first established by the American spongiologist Max Walker de Laubenfels in 1932. It contains these 27 species:
Stylissa is a genus of sponges in the family Scopalinidae.
Cinachyrella is a genus of marine sponges in the family Tetillidae.
Gelliodes is a genus of sponges in the family Niphatidae.
Crella is a genus of marine demosponges in the family Crellidae.
Clathria (Clathria) is a subgenus of demosponge in the family Microcionidae.
