Well-cleaned, thoroughly cooked, deboned fish of any kind probably wouldn’t hurt your dog.

Salmon Poisoning

Salmon isn’t poisonous in and of itself. There is a serious, potentially fatal disease called “salmon poisoning,” which is actually caused by a tiny, parasitic organism carried by a fluke (a small, flat worm) that fish can pick up. Cooking fish kills the organism, so "salmon poisoning" can only be passed along by raw or undercooked fish.

Beware of Fish Bones

Even cooked fish can be dangerous to your dog, particularly because it contains a lot of small bones, which are hard for even the most careful cook to remove. These sharp little bones can choke your dog or even damage his esophagus or the rest of his digestive tract. Talk to your veterinarian about developing a diet appropriate to your canine friend.