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Hagfishes (Myxinidae) are a family of jawless marine pre-vertebrates. Those video images taken in New Zealand revealed that hagfishes are able to choke their would-be predators with gill-clogging also shows that hagfishes are actively preying on other fish in New Zealand waters. The video is part of a scientific paper describing this newly discovered behaviour which can be downloaded online at Zintzen V., Roberts, C.D., Anderson
