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The feeding behavior of the cosmopolitan cold-water coral (CWC)  Desmophyllum dianthus  (Cnidaria: Scleractinia) is still poorly known. Its usual deep distribution restricts direct observations, and manipulative experiments are so far limited to prey that do not occur in CWC natural habitat. During a series of replicated incubations, we assessed the functional response of this coral feeding on a medium-sized copepod ( Calanoides patagoniensis ) and a large euphausiid ( Euphausia vallentini ). Corals showed a Type I functional response, where feeding rate increased linearly with prey abundance, as predicted for a tentaculate passive suspension feeder. No significant differences in feeding were found between prey items, and corals were able to attain a maximum feeding rate of 10.99 mg C h −1 , which represents an ingestion of the 11.4% of the coral carbon biomass per hour. These findings suggest that  D. dianthus  is a generalist zooplankton predator capable of exploiting dense aggregations of zooplankton over a wide prey size-range.

All you can eat: the functional response of the cold-water coral Desmophyllum dianthus feeding on krill and copepods