International Union for Conservation of Nature Grijze zeehond op de IUCN Red List of Threatened Species. Halichoerus grypus IUCN Red List of Threatened Species 2013.2 [9660] Grijze zeehond op de IUCN Red List of Threatened Species. Halichoerus grypus. Halichoerus grypus International Union for Conservation of Nature International Union for Conservation of Nature Halichoerus grypus (Gray Seal, Grey Seal) Dostupné online International Union for Conservation of Nature Dostupné online Halichoerus grypus. Halichoerus grypus Halichoerus grypus