Common name: Poisonous Sponge

General information

Petrosia ficiformis, commonly known as the Poisonous Sponge or Ficiformis Sponge, is a species of marine sponge found in the Mediterranean Sea and adjacent Atlantic areas. This sponge is known for its firm, stone-like structure and its potential to produce bioactive compounds, some of which can be toxic to fish and other marine organisms. It exhibits a variety of colors, typically ranging from light grey to dark purple.

Care

In the aquarium, Petrosia ficiformis requires a setup that mimics its natural environment. It thrives in areas with moderate to strong water flow and low to moderate lighting. This sponge filters water to feed on microscopic particles and dissolved organic matter, so maintaining high water quality is crucial. It is not a common species in the hobby due to its specific care requirements and potential toxicity.

Reproduction

Like many sponges, Petrosia ficiformis reproduces both sexually and asexually. Sexual reproduction involves the release of sperm into the water column, which then fertilizes eggs within other sponges. Asexually, it can reproduce by budding or fragmentation, where pieces of the sponge break off and grow into new individuals.

Habitat

Petrosia ficiformis is typically found in rocky subtidal zones, often in caves or overhangs where it is protected from intense light and sedimentation. It can be found at depths ranging from shallow waters to over 100 meters deep, but it is most commonly observed between 10 and 40 meters.