Common name: elephant ear sponge

General information

The Elephant Ear Sponge, Ianthella basta, is a large and impressive sponge species known for its ear-like shape and striking appearance. It is a filter feeder, drawing in water to extract nutrients, and is often found in a variety of colors, including shades of blue, purple, and brown. This sponge is not only a fascinating organism in its own right but also plays a crucial role in the marine ecosystem by filtering water and providing habitat for other marine life.

Care

Ianthella basta requires a well-established aquarium with stable water conditions and strong water flow to mimic its natural environment. It is a non-photosynthetic species, meaning it does not rely on light for its nutrition but rather on the availability of dissolved organic matter in the water. Hobbyists should ensure that the sponge is never exposed to air, as this can cause air bubbles to become trapped in its internal canal system, leading to tissue necrosis.

Reproduction

Sponges like Ianthella basta reproduce both sexually and asexually. In the aquarium, asexual reproduction is more common, where the sponge can regenerate from fragments. Sexual reproduction involves the release of sperm into the water column, which then fertilizes eggs in other sponges. The resulting larvae are free-swimming before settling down to grow into new sponges.

Habitat

Ianthella basta is typically found in the Indo-Pacific region, attached to reef structures or other hard substrates. It thrives in areas with strong currents, which facilitate its filter-feeding behavior. In the wild, these sponges can be found at various depths, often ranging from shallow waters to depths of over 30 meters.