A breaching whale crashed into a boat Tuesday in Portsmouth Harbor, capsizing it and sending two people into the water.Video captured from another boat showed the whale smashing into the vessel. The Portsmouth-based Blue Ocean Society for Marine Conservation identified the whale in the video as a humpback whale.Brothers Colin and Wyatt Yager, of Maine, said they were out fishing about a mile off the New Hampshire coast for the first time when the whale appeared. They said they saw it breach a couple of times, so Colin Yager pulled out his phone to try to catch it on camera."I had my fishing rod right here, phone in my hand and just saw it go up, and was just lucky enough to be facing the right direction," he said.>> Expert: Whale likely feeding when it came in contact with boatThey then watched as the whale smashed into the other fishing boat."I saw it come up, and I was just like, 'Oh no, it's going to hit the boat!' and then it started to flip," Wyatt Yager said.The brothers came about and helped the other boaters out of the water. >> Listen: Mayday call made after boat hit by whaleThe fishermen said they had seen the whale earlier and were staying on the far edge of the large group of fish to try to keep their distance. But by the time the whale was breaching out of the water, it was too late. "When I turned, the whale's head was already landing on the engine," said fisherman Greg Paquette. "So when I saw that, then all of a sudden, I look down, the boat is pitching up, the transom is going down into the water."Fellow fisherman Ryland Kenney said the experience was surreal."Everything seemed like in slow motion. It was really weird," he said. "Everyone was like, 'Oh, it was eight seconds. How'd you move so fast?' But it was almost slow motion, like a movie."The brothers noted that one of the fishermen was wearing a life jacket, and that's something they plan to do from now on.The U.S. Coast Guard said it the whale did not appear to be injured in the encounter. The Coast Guard said the vessel was salvaged.Sara Morris, of the University of New Hampshire Shoals Marine Laboratory, said the whale was likely lunge feeding when it came in contact with the boat. "I think one of the key things is that when whales are sighted to encourage boaters to keep their distance," Morris said. "The whales are moving around underwater and coming up, potentially in an area different from where they went down, and we want to give them as much leeway as we possibly can to avoid a situation like what you see here."