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Good photo - the bow wave is very clear and some of the countershading of the body shows in the trough. I guess you heard the blows very clearly as well.
Yes, there was barely a ripple on the water and the boat's engines were switched off to attract them closer - estimates of over 100 animals there. Heard the blows very well, same with the Minke Whales we had the same day.
Lat/Lng: 56.6, -6.3
OS grid ref: NM4161