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The article discusses research done on feeding habits and niche separation among several deep-sea chimaeroid fishes found in Chatham Rise, New Zealand, including Hydrolagus (H.) novaezealandiae, H. bemisi and Harriotta (H.) raleighana. The study procedure included the examination of the digestive tract contents of the fishes, which were fed on benthic infauna and epifauna. Results revealed that the diets of H. novaezealandiae, H. bemisi and H. raleighana were characterized by crabs and sea urchins, by crabs and polychaetes, and by polychaetes and molluscs, respectively.