Summary[edit] Description: English: Gandalfus puia McLay, 2007.Collected from around 400 meters on the summit of Rumble 5 seamount on the Kermadec volcanic arc. The carapace of the specimen is about 3 centimetres across. Source: This week's grumpy crab Critter is the New Zealand vent crab Gandalfus puia @reviewers : Click on the thumbnail image, and then on the little BY icon. Author: Rob Stewart NIWA/ NIRVANA voyage TAN1213.