Cod are coming back to Atlantic Canada. Slowly, here and there, but the signs are positive.
That's good news after the catastrophic collapse of the Newfoundland cod fishery two decades ago. Since then, we've learned a lot about the effects of overfishing on ocean ecosystems, and the mysterious non-recovery once fishing was stopped.
One problem has been that fishing wasn't actually stopped, and remaining low-level fisheries inhibited recovery.
One worrisome sign is that the fish are smaller than they used to be, what's up with that? Is it a blip that will go away, or a changed system?