Feeding whales are generally a very good sign for catching salmon during the summer and early fall. In the spring, it can be a different story. It appears that humpbacks quickly figure out the release timing of juvenile salmon from hatcheries in Southeast Alaska. As the magic release date arrives, the whales show up. This is forcing hatchery managers to rethink their timing and how many wee salmon they release at one time. If a humpback is hanging out front of the hatchery when the entire brood year is released, it could very easily eat almost all of them in a few mouthfuls.