I don't spend enough time on the coast to be confident identifying these critters.
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Defintely a common seal. Puppy dog head and bannana shaped position of the body in the third picture. All I can say is perhaps it is the time of the year or that I tend to work south of Robin Hood's Bay and skip Whitby going further north to the coast around Middlesborough where commons are common. I had assumed Whitby would be similar to RHB where greys are the commonest seal.
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This seal (or another that looked very similar) appeared on the same rock over the period 20-25th August.
It clearly must have been leaving and coming back since the rock was submerged at high tide.
Lat/Lng: 54.4905, -0.6089
OS grid ref: NZ902114