The Grey Seal (Halichoerus grypus, meaning "hooked-nosed sea pig") is found on both shores of the North Atlantic Ocean.
It's a large seal of the family Phocidae or "true seals" and is the only species classified in the genus Halichoerus.
It's also known as Atlantic Grey Seal and the Horsehead Seal.
It is a medium sized seal, with the bulls reaching 2.5–3.3 m long and weighing up to 300 kg.
The cows are much smaller, typically 1.6–2.0 m long and 100–150 kg weight.
It is distinguished from Common Seal by its straight head profile with nostrils that are well apart, and fewer spots on its body.
Bull Grays have larger noses and a more convex profile than Common Seal bulls.
Males are often darker than females, with lighter patches and often scarring around the neck.
Females are silver grey to brown with dark patches.
Reference: Wikipedia