The Sea Lion traveled into Tracy Arm today. As we cruised up the 25-mile length of this fjord, we were awed by the 2000-foot high granite cliffs, numerous waterfalls, and gorgeous green water. At the head of Tracy Arm were two tidewater glaciers, each with blue ice towering hundreds of feet over the water. Everyone was on the bow as we watched each glacier for about an hour on this bright, sunny day. We were rewarded with spectacular "calving", which is when glacial ice breaks off and falls into the fjord with a huge splash and a loud thundering bang. One section of falling ice sent a huge tsunami-like wave across the fjord, lifting thousands of icebergs upon its crest. It was interesting that these waves were ignored by the hundreds of harbor seals riding on these icebergs and swimming in the nearby water.