Common name: white tit-sponge

General information

The Mamillaris Sponge, scientifically known as Polymastia mamillaris, is a fascinating marine invertebrate that adds a unique texture and form to the reef aquarium. This sponge is characterized by its numerous nipple-like protrusions, which give it a distinctive pillow-like appearance. It is a non-photosynthetic filter feeder, relying on the flow of water through its body to capture food particles.

Care

Caring for Polymastia mamillaris requires a well-established aquarium with stable water conditions and moderate to strong water flow to facilitate its feeding process. It is important to provide a diet rich in dissolved organic matter and fine particulate food, which can be achieved through regular feedings of liquid invertebrate food or by the presence of a diverse and healthy microfauna population in the tank.

Reproduction

In the wild, Polymastia mamillaris reproduces both asexually, through budding, and sexually, by releasing gametes into the water column. In the aquarium, asexual reproduction is more commonly observed, with new sponges budding off from the parent organism. This can be an interesting process to observe and can contribute to the natural propagation of the species within the tank.

Habitat

Mamillaris Sponge is typically found in colder waters of the North Atlantic, from the intertidal zone down to depths of several hundred meters. In the aquarium, it should be placed in an area with good water flow but away from intense lighting, as it does not require light for photosynthesis and can be sensitive to high light levels.