Orange Encrusting Sponge
Crambe crambe
Sighting evidence at Blue Cave (Light Cave), Fethiye / Göcek
Vivid orange mats coat the cave walls wherever direct light fades, thriving in the dim photic zone that excludes algae but suits filter feeders. These chemically defended sponges release toxins that deter most grazers, allowing them to claim large surface areas in low-competition cave environments. They serve as habitat structure for tiny invertebrates and provide colour contrast that makes the cave walls visually dramatic.
Evidence at this site
No confirmed records on file at this site
Orange Encrusting Sponge is listed as a curated species here based on historical reports.