Common name: Calcarea

Calcarea, commonly known as calcareous sponges, are a class of sponges found in a variety of marine environments. They are characterized by their calcium carbonate spicules, which provide support and deter predators. These sponges are relatively simple organisms with a porous body and a unique canal system for circulating water. Calcareous sponges can vary in color and shape, often contributing to the biodiversity of reef environments. They are filter feeders, playing a crucial role in nutrient cycling within their ecosystems. In the aquarium, they require stable water conditions and moderate lighting.

1. 
   Common name: Canary Damsel

   Scientific name: Arthuria canariensis
2. 
   Common name: yellow Clathrina

   Scientific name: Clathrina clathrus
3. 
   Common name: white lace sponge

   Scientific name: Clathrina coriacea
4. 
   Common name: Lemon sponge

   Scientific name: Leucetta chagosensis
5. 
   Common name: Urn Sponge

   Scientific name: Leucilla nuttingi
6. Common name: Johnston's Sponge

   Scientific name: Leuconia johnstoni
7. 
   Common name: White Sponge

   Scientific name: Leuconia nivea
8. 
   Common name: orange pipe sponge

   Scientific name: Leucosolenia botryoides
9. Common name: Leucosolenia complicata

   Scientific name: Leucosolenia complicata
10. Common name: Leucosolenia eleanor

    Scientific name: Leucosolenia eleanor
11. 
    Common name: Leptoseris Coral

    Scientific name: Pericharax heteroraphis
12. 
    Common name: Vase Sponge

    Scientific name: Sycon ciliatum