Grey seal

Grey seal, Illustration by A. Francis, courtesy of Brighton Dolphin Project

The grey seal is found on both shores of the North Atlantic Ocean. It is a large seal of the family Phocidae, which are commonly referred to as “true seals” or “earless seals”. In the UK average weights are 233 kg (514 lb) for males and 154.6 kg (341 lb) for females with Bulls reaching 1.95–2.3 m (6 ft 5 in–7 ft 7 in) and cows typically 1.6–1.95 m (5 ft 3 in–6 ft 5 in) long.

Did you know?

Grey seals can stay underwater for up to 16 minutes, diving as deep as 300 meters, but usually diving to around 70 meters

 

Harbour seal

Harbour seal illustration by A. Francis, courtesy of Brighton Dolphin Project.
The harbour seal, also known as the common seal, is a true seal found along temperate and Arctic marine coastlines of the Northern Hemisphere. The most widely distributed species of Pinniped (walruses, eared seals, and true seals), they are found in coastal waters of the northern Atlantic, Pacific, Baltic and North Seas.

An adult can attain a length of 1.85 m (6.1 ft) and weight up to 168 kg (370 lb). 

Did you know?

Harbour seals can dive deeper than their Grey cousins, diving to 427 meters and staying underwater for almost 30 minutes. However, the average dive is usually a few minutes, going down to 90 meters. They also like to observe humans walking on beaches from the safety of the water, but are wary of humans on land and will rush to the sea if disturbed.