Common name: Giant Elephant Ear Sponge

General information

The Giant Elephant Ear Sponge, scientifically known as Pachymatisma johnstonia, is a large and impressive species of marine sponge found in the North Atlantic Ocean. This sponge is known for its substantial size and ear-like shape, which can add a dramatic and natural look to any reef aquarium. It is a filter feeder, drawing in water to extract nutrients, and thus plays a role in maintaining water quality.

Care

Caring for Pachymatisma johnstonia requires a stable and mature reef aquarium with strong water flow and excellent water quality. It is essential to provide a diet rich in dissolved organic matter, which the sponge will filter from the water. Sponges are sensitive to changes in water parameters, so maintaining consistency is crucial for their health.

Reproduction

Reproduction in Pachymatisma johnstonia is not commonly observed in the home aquarium. In the wild, sponges can reproduce both sexually and asexually. Sexual reproduction involves the release of sperm into the water column, which then fertilizes eggs in other sponges. Asexual reproduction can occur through budding or fragmentation.

Habitat

Pachymatisma johnstonia is typically found in colder waters of the North Atlantic, from the intertidal zone down to depths of around 100 meters. They are often attached to hard substrates such as rocks or the seafloor, where they can take advantage of strong currents for feeding.