Common name: Tetractinellida

Tetractinellida is an order of marine sponges known for their robust and often massive forms. These sponges typically have a complex skeleton made of silica spicules, which can vary widely in shape and size. They are found in a variety of reef environments and can be important contributors to reef structure and biodiversity. Tetractinellida sponges are filter feeders, playing a crucial role in water purification. They can be challenging to keep in home aquariums due to their specific flow and feeding requirements.

1. 
   Common name: Australian Sponge

   Scientific name: Cinachyrella australiensis
2. 
   Common name: Serpentine Sponge

   Scientific name: Jaspis serpentina
3. Common name: Stellate Sponge

   Scientific name: Jaspis stellifera
4. Common name: Sarasin's Pincushion Coral

   Scientific name: Melophlus sarasinorum
5. 
   Common name: Giant Elephant Ear Sponge

   Scientific name: Pachymatisma johnstonia