True. In Alaska, bald eagles swarm fish boats the way seagulls will swarm your picnic at the beach. Video: https://www.youtube.com/watch?v=MLMa1DO-x5g

Great video!

I've been lucky enough to see White Tailed Eagles in Norway, and they too will follow boats that have fish. Although I don't think there are enough eagles for a swarm. There is a White Tailed Eagle in Poole Harbour (near to where I live on the UK sough coast), and he also only eats fish.