Not all halibut steaks are equal on the sustainability scale. If you want an eco-friendly type of halibut, you need to look for halibut steaks that come from the Pacific Ocean. Most of the halibut you'll find does come from Alaska, as this is where it's considered a renewable source of fish. In the Atlantic, you can find halibut, but it's not as abundant and, therefore, not a sustainable source for this type of fish. Check the label or inquire at the supermarket to ensure you're getting sustainable fish.