Animalia > Chordata > Mammalia > Carnivora > Phocidae > Halichoerus > Halichoerus grypus

Halichoerus grypus (Gray Seal; horsehead; Baltic gray seal; Atlantic seal; Atlantic gray seal)

Language: French

Wikipedia Abstract

The grey seal (Halichoerus grypus, meaning "hooked-nosed sea pig") is found on both shores of the North Atlantic Ocean. It is a large seal of the family Phocidae or "true seals". It is the only species classified in the genus Halichoerus. Its name is spelled gray seal in the US; it is also known as Atlantic seal and the horsehead seal.
View Wikipedia Record: Halichoerus grypus


EDGE Analysis

Uniqueness Scale: Similiar (0) 
 Unique (100)
Uniqueness & Vulnerability Scale: Similiar & Secure (0) 
 Unique & Vulnerable (100)
ED Score: 7.75
EDGE Score: 2.17


Gestation [2]  8 months
Litter Size [2]  1
Litters / Year [2]  1
Maximum Longevity [2]  43 years
Speed [4]  3.825 MPH (1.71 m/s)
Water Biome [1]  Coastal, Brackish Water
Weaning [2]  19 days
Adult Weight [2]  590.842 lbs (268.00 kg)
Birth Weight [2]  30.865 lbs (14.00 kg)
Diet [3]  Carnivore (Invertebrates), Piscivore
Diet - Fish [3]  80 %
Diet - Invertibrates [3]  20 %
Forages - Marine [3]  100 %
Female Maturity [2]  4 years
Male Maturity [2]  5 years 2 months

Protected Areas

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Prey / Diet

Prey / Diet Overlap


Institutions (Zoos, etc.)

Range Map


North America;

External References



Attributes / relations provided by
1Myers, P., R. Espinosa, C. S. Parr, T. Jones, G. S. Hammond, and T. A. Dewey. 2006. The Animal Diversity Web (online). Accessed February 01, 2010 at
2de Magalhaes, J. P., and Costa, J. (2009) A database of vertebrate longevity records and their relation to other life-history traits. Journal of Evolutionary Biology 22(8):1770-1774
3Hamish Wilman, Jonathan Belmaker, Jennifer Simpson, Carolina de la Rosa, Marcelo M. Rivadeneira, and Walter Jetz. 2014. EltonTraits 1.0: Species-level foraging attributes of the world's birds and mammals. Ecology 95:2027
4How fast does a seal swim? Variations in swimming behaviour under differing foraging conditions, Susan L. Gallon, Carol E. Sparling, Jean-Yves Georges, Michael A. Fedak, Martin Biuw and Dave Thompson, The Journal of Experimental Biology 210, 3285-3294 (2007)
5Offshore diet of grey seals Halichoerus grypus near Sable Island, Canada, W. D. Bowen, G . D. Harrison, Mar. Ecol. Prog. Ser. 112: 1-11, 1994
6Jorrit H. Poelen, James D. Simons and Chris J. Mungall. (2014). Global Biotic Interactions: An open infrastructure to share and analyze species-interaction datasets. Ecological Informatics.
7CephBase - Cephalopod (Octopus, Squid, Cuttlefish and Nautilus) Database
8Nunn, C. L., and S. Altizer. 2005. The Global Mammal Parasite Database: An Online Resource for Infectious Disease Records in Wild Primates. Evolutionary Anthroplogy 14:1-2.
9Gibson, D. I., Bray, R. A., & Harris, E. A. (Compilers) (2005). Host-Parasite Database of the Natural History Museum, London
Protected Areas provided by Natura 2000, UK data: © Crown copyright and database right [2010] All rights reserved. Ordnance Survey Licence number 100017955
Biological Inventories of the World's Protected Areas in cooperation between the Information Center for the Environment at the University of California, Davis and numerous collaborators.
GBIF Global Biodiversity Information Facility
Abstract provided by DBpedia licensed under a Creative Commons License