A global community of nature enthusiasts
photographing and learning about wildlife
Sponge formed by a basal network of thin-walled tubes. It is white, gray or yellow in color. All sponges are filter fed. Particle-laden water penetrates through pores. Particles suitable for food are digested intracellularly and inorganic particles, such as grains of sand, are expelled through an exhalation channel.
Salty coastal lagoon of the Mar Menor. I have found several sponges on rocks hidden by the green alga Caulerpa prolifera that protects them from the strong sun.
Given the totipotency of their cells, all sponges can reproduce asexually from fragments of their body. · Sponges produce a wide variety of toxins and antibiotics to prevent predation and competition for the substrate.