Common name: Cactus Sponge

General Information

The Cactus Sponge or Orange Lumpy Sponge, Acanthella acuta, is a unique and fascinating species of marine sponge known for its striking appearance and ecological role in the ocean. This species is not commonly found in the aquarium trade, but it has garnered interest among marine biologists and hobbyists due to its intricate structure and potential benefits to reef ecosystems.

Acanthella acuta is part of the Demospongiae class, which comprises the largest group of sponges. Its sharp, needle-like spicules give it a distinctive texture and appearance, making it easily identifiable among other sponge species. Although not typically kept in home aquariums, its presence in natural reef environments contributes to the overall health and diversity of the ecosystem.

Care

Caring for Acanthella acuta in captivity is challenging due to its specific environmental needs and sensitivity to water quality. It thrives in well-established reef tanks with stable water parameters and excellent water quality. Providing a habitat that mimics its natural environment, with plenty of live rock and moderate water flow, is crucial for its survival.

Diet and Feeding

Acanthella acuta primarily feeds on plankton and other microscopic particles suspended in the water. In captivity, ensuring a constant supply of planktonic food sources is essential for its nutrition. This can be achieved through the use of specialized planktonic feeds or by maintaining a diverse and thriving microfauna population within the tank.

Behavior and Compatibility

This species is non-aggressive and poses no threat to other tank inhabitants. However, its compatibility with other species is limited due to its specific care requirements. It is best housed in dedicated reef tanks with other non-competitive species that do not outcompete it for food.

Health and Common Issues

Maintaining optimal water quality is crucial for the health of Acanthella acuta. Poor water conditions can lead to rapid deterioration and death. Regular monitoring of water parameters and ensuring a stable environment are essential to prevent common issues such as tissue necrosis.

Habitat

Acanthella acuta is typically found in tropical and subtropical reef environments, often inhabiting rocky substrates and coral reefs. Its natural distribution includes parts of the Indo-Pacific region, where it contributes to the complex and diverse reef ecosystems. It prefers areas with moderate water flow and access to plenty of planktonic food sources.