Fauna
Invertebrate

Potato Sponge

Chondrilla nucula

Also known as Caribbean Chicken-liver Sponge, Chicken Liver Sponge

Potato sponges form smooth, leathery sheets or rounded, tuber-like cushions across shallow Caribbean reefs, seagrass beds, and mangrove roots. They host dense colonies of photosynthetic cyanobacteria in their outer cortex, giving them a glossy olive-brown coloration and supplementing their filter feeding with solar energy. Capable of prolific asexual reproduction via fragmentation and budding, these hardy sponges can rapidly colonize bare substrate and occasionally overgrow damaged hard corals.

MarineFilter FeederReef Dweller
Potato Sponge reference1 / 7
(c) Emanuele Santarelli, some rights reserved (CC BY-SA), uploaded by Emanuele Santarelli · cc-by-sa
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Not EvaluatedConservation statusIUCN Red List categoriesLCNTVUENCREWEXNot Evaluated — not placed on the risk ladderRed List categories, explained →
Key facts
Diet & preyMarine Bacteria, Phytoplankton, Suspended Organic Detritus
Predators
  • Hawksbill Sea Turtle
  • Queen Angelfish
  • Rock Beauty
ThreatsCoral reef degradation, marine heatwaves, heavy sedimentation, and pollution
HabitatsShallow coral reefs, seagrass meadows, mangrove prop roots, and rocky hardbottoms
Life spanSeveral years to decades (via ongoing somatic renewal and budding)
Classification
  1. FamilyChondrillidae
  2. SpeciesChondrilla nucula
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Harmless to humans; safe to observe while snorkeling or diving.
Responsible observation
  • Reef Etiquette: Avoid touching or kicking colonies, as physical abrasion tears the delicate dermal layer and disrupts water pumping.
  • Snorkel Observation: Look closely for the raised oscula (exhalant chimneys) discharging clear, filtered water into the sea.
  • Sunlight Clues: Notice how individuals exposed to bright sunlight appear dark brown, while those shaded beneath ledges are pale cream.
Related species
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