Molluscs, marine, mucus

Spinella, A. Mollo, E. Trivellone, E. Cimino, G. (1997) Testudinariol A and B, two unusual tritopraioids from file skin and the mucus of the marine mollusc Pleurobranchus testudinarius. Tetrahedron, 53, 16891-6. 

Many species of marine molluscs are physically defended from predation by the presence of a hard shell or by the ingestion of undischarged nematocysts. The need for soft shelled or soft bodied molluscs to have an alternative, chemically-based defensive mechanism was first explored by Faulkner and Ghiselin.230 When molested, many species of mollusc secrete a mucus that is deterrent to predators and which has been shown to be toxic 131 180 231 232 many mollusc extracts are toxic.233... 

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