Gray Seal

Gray Seal

Halichoerus grypus

Silhouette: Margot Michaud · PhyloPic

Least ConcernNear ThreatenedVulnerableEndangeredCritically Endangered
Daily sighting probability ~40% · Likely
at Snowdonia National Park
19 Verified sightings at Snowdonia National Park From 2019 to 2026
1,166 Verified sightings across all 6 parks From 2019 to 2026
October Best month highest sighting rate
☀️ Diurnal When it's spotted during daytime hours (6am–6pm)

About the Gray Seal

The grey seal (Halichoerus grypus), or gray seal in the United States, is a large seal of the family Phocidae, which are commonly referred to as "true seals" or "earless seals". The only species classified in the genus Halichoerus, it is found on both shores of the North Atlantic Ocean. In Latin, Halichoerus grypus means "hook-nosed sea pig". It is also known as the horsehead seal, owing to its large head.

The grey seal is large and heavy, with individuals from the eastern Atlantic being 1.6–2.3 m (5 ft 3 in – 7 ft 7 in) long and weighing 100–310 kg (220–680 lb), while individuals from the western Atlantic are up to 2.7 m (8 ft 10 in) long, and can reach a weight of as much as 400 kg (880 lb). It is found widely across the northern Atlantic, ranging from the US to Russia, and occasionally as far south as Portugal. It can be divided into two subspecies: the Baltic grey seal (Halichoerus grypus grypus), found in the Baltic Sea, and the Atlantic grey seal (Halichoerus grypus atlantica), found everywhere else. The largest populations are in Canada and the UK.

Grey seals have a varied diet, feeding mostly on fish, and occasionally on invertebrates such as octopuses and lobsters. Their main predators are orcas, and they are also prey to sharks. The pups main predator is often eagles and gulls. Wikipedia →

Global Distribution

Warmer areas are where this animal is recorded most often.

Parks Where Found

# Park Country Daily sighting probability
1 Snowdonia National Park 🇬🇧 United Kingdom
~40%
2 Cape Breton Highlands National Park 🇨🇦 Canada
~30%
3 Wadden Sea National Park 🇩🇪 Germany
~30%
4 Acadia National Park 🇺🇸 United States
~30%
5 Vatnajokull National Park 🇮🇸 Iceland
~10%
6 Gros Morne National Park 🇨🇦 Canada
Insufficient data

Quick answers

What are the chances of seeing a Gray Seal in Snowdonia National Park?

About 40% of wildlife watchers report a Gray Seal sighting in Snowdonia National Park, based on 19 verified sightings from GBIF citizen-science data.

When is the best time to see Gray Seal in Snowdonia National Park?

October has the highest sighting rate for Gray Seal in Snowdonia National Park in our monthly data.

← Back to Snowdonia National Park