Have you ever seen what a kingfisher does to a minnow when it plucks it out of the water? It's not a pretty sight. Kingfishers don't have beaks lined with felt. When the swoop down on a minnow and nail them with their beak, I don't think they're gonna be gently moving them to a new body of water for release but I could be wrong. Doesn't take much water for a fish, especially an FHM to swim in...
Kingfisher was collecting them as it stood in or near the shallows of pond. Not dive bombing. One by one was transported and released unharmed.
Its not unusual for animals to be multi-talented. A simple example: A dog can tear you apart with it's teeth, and then pick up a young pup ever so gently.