Stick with seagoing for both. Is Seahawk available? The two birds that have that as an alternative name are the Osprey and the Skua. https://en.wikipedia.org/wiki/Skua
Another name for Skua is jaeger, which is German for hunter. Skua is available.
After all, a Kipper is a smoked herring.
"I'm a lumberjack, and I'm okay." Thread killer Extraordinaire