Janthina exigua (Lamarck, 1822) Height 23mm, Width 21mm Violet Snail, Marine, Pelagic, feeds mainly on colonial cnidarians (Physalia, Velella, Porpita). Commonly washed ashore on ocean beaches Tropical and temperate seas. West Norfolk Ridge, Raoul, Three Kings and North Islands, northern South Island, Stewart Island and Chatham Islands, from 0-1000m |
Janthina globosa Swainson, 1826 Height 32mm, Width 26mm Violet Snail, Marine, Native - Non-endemic, Pelagic, feeds mainly on colonial cnidarians (Physalia, Velella, Porpita) Tropical and temperate seas. Raoul Island and northern North Island as far south-east as Waihau Bay, from 0-530m |
Janthina janthina (Linnaeus, 1758) Width 40mm, Height 38mm Violet Snail, Marine, Native - Non-endemic, Pelagic, feeds mainly on colonial cnidarians (Physalia, Velella, Porpita) Tropical and temperate seas. West Norfolk Ridge, Raoul, Three Kings, North, South, Stewart and Chatham Islands, from 0-805m |
Janthina umbilicata d'Orbigny, 1840 Height 20mm, Width 17mm Marine, Pelagic, feeds mainly on colonial cnidarians (Physalia, Velella, Porpita) Tropical and temperate seas. Raoul Island and northern North Island as far south as Motuhora Island |