Common name: brown encrusting octopus sponge

General information

The Fierce Sponge, scientifically known as Ectyoplasia ferox, is a species of marine sponge found in the Caribbean Sea. It is known for its unique appearance, often resembling an encrusting octopus with its sprawling branches and brownish coloration. This sponge is not only fascinating in its form but also plays a role in the marine ecosystem by filtering water and providing habitat for other organisms.

Care

In the home aquarium, Ectyoplasia ferox requires a moderate level of care. It thrives in well-established tanks with stable water conditions and strong water flow, which mimics its natural environment. Adequate lighting is also necessary, although this sponge does not have the same intense lighting requirements as some corals. It's important to note that sponges should never be exposed to air, as trapped air bubbles can be fatal.

Reproduction

Like many sponges, Ectyoplasia ferox reproduces both sexually and asexually. In the aquarium, asexual reproduction through budding or fragmentation is most common. This allows hobbyists to propagate the sponge by carefully cutting a piece of it and allowing it to attach and grow on another rock or surface.

Symbiosis

Ectyoplasia ferox has a symbiotic relationship with various microorganisms, including bacteria and single-celled algae known as zooxanthellae. These symbionts can provide the sponge with additional nutrients through their metabolic processes, which is particularly beneficial in nutrient-poor environments.

Habitat

The natural habitat of the Fierce Sponge is typically on coral reefs or rocky substrates in the Caribbean Sea. They are often found at depths ranging from shallow waters to about 40 meters deep. In the reef aquarium, replicating this environment with live rock structures and maintaining water quality is key to the sponge's health.