Rust is a good thing in a selective barbless hook marine fishery.

First off, if you break a fish off, the hook will eventually rust away in the salt.

Second, the rust is a good thing as it creates additional surface texture that resists having a barbless hook slide out. That means more fish to the boat.

And thirdly, it's good job security for T-Rip and rvrfshr.... dadgummit, somebody's gonna have to buy replacement hooks at some point.