Common name: Blue Sponge

General Information

The Blue Sponge, scientifically known as Halisarca caerulea, is a captivating addition to any marine aquarium, offering a unique aesthetic with its striking blue hue. This species belongs to the phylum Porifera, commonly referred to as sponges, which are known for their porous bodies and ability to filter feed. Halisarca caerulea is relatively new to the aquarium trade but has quickly gained popularity among enthusiasts for its vibrant color and interesting texture.

While not as widely recognized as some other marine invertebrates, the Blue Sponge plays a significant role in marine ecosystems by filtering water and providing habitat for microorganisms. Its presence in home aquariums can contribute to biodiversity and offer educational opportunities about marine life and filtration processes.

Care

Caring for Halisarca caerulea requires attention to water quality and flow. These sponges thrive in well-established tanks with stable parameters. They prefer moderate to high water flow, which helps them filter feed efficiently. Lighting should be moderate, as intense light can harm them. It's essential to maintain pristine water conditions to prevent the sponge from deteriorating.

The Blue Sponge does not require a large tank but benefits from being in a system with live rock, which can aid in maintaining water quality and provide additional surfaces for attachment.

Diet and Feeding

As a filter feeder, Halisarca caerulea extracts nutrients from the water column. It feeds on microscopic particles, including bacteria and plankton. In captivity, it may benefit from supplemental feedings of phytoplankton or specially formulated sponge foods to ensure it receives adequate nutrition.

Behavior and Compatibility

The Blue Sponge is peaceful and poses no threat to other tank inhabitants, making it an excellent choice for community reef tanks. It does not exhibit any aggressive behaviors and can coexist with a variety of marine species.

Health and Common Issues

Halisarca caerulea is sensitive to poor water quality and rapid changes in tank conditions. Maintaining stable parameters and regular monitoring is crucial for its health. Signs of stress or poor health include discoloration and tissue degradation. Ensuring proper water flow and filtration can help mitigate these issues.

Habitat

In the wild, Halisarca caerulea is found in the Indo-Pacific region, typically inhabiting coral reefs and rocky substrates. It thrives in environments with clean, nutrient-rich waters and moderate to strong currents, which facilitate its filter-feeding lifestyle.