Gibbonsia elegans

A series of bipyrrole compounds, the tambjamines, e.g. 149-150, act as chemical defenses for several nudibranch species. They deter feeding of the spotted kelpfish, Gibbonsia elegans, at concentrations from 1-10 pg/mg food pellet [116]. 

The intertidal limpet Collisella limatula contains limatulone (914) which inhibits fish and crab predation (600b). Food pellets containing 914 at levels of 0.05% dry weight or more induced regurgitation in the intertidal fish Gibbonsia elegans, a known limped predator. The marine prosobranch mollusc, Lamellaria sp. furnished four aromatic metabolites, lamellarins A-D (915-918) (600 c). At concentrations of 19 pg/mL, 918 caused a 78% inhibition of cell division in the fertilized sea urchin egg assay while 917 caused 15% inhibition and 915 as well as 916 were inactive. 

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