
If you're like me you love sushi and the healthy benefits of of eating fresh fish. However, there are many questions these days about the environmental and health costs to consuming fish. Many of us have heard about the devastation taking place in our oceans from over fishing. There is also the mercury hazard posed by large fish when consumed. Another concern is the environmental toll of eating farmed fish.
While each of these concerns is valid, with some consideration there are ways that you can eat fish while minimizing the health risks and environmental costs.

At first glance it's easy to assume that farm raised fish cannot be a good thing. However, a close look reveals that farm raised fish have some benefits and should be part of a comprehensive strategy for managing the global over-fishing problem. Where a particular fish is in high-demand and is over-fished, fish farming is a great alternative until the ocean levels are restored. Additionally, farm fish are much less likely to have mercury exposure. The down side is that the protein rich feed required is from raising fish as food and then grinding it. Additionally, a lot of fresh water is required for fish farming and it must be regularly treated to ensure it remains a healthy environment. The most common fish which are farm produced are salmon, carp, tilapia, catfish and cod. While these are not over-fished in the ocean, the carbon cost of transport is far less than ocean trawling, storage and transport.
To minimize your risk of mercury exposure ensure that the fish you consumer is either farm raised of from the bottom of the food chain. Fortunately, many of the ocean fish which are not facing over-fishing risk are also much lower on the food chain.
Here is a list of fish which are not facing imminent risk from over-fishing
1. Abalone (farmed only)
2. Alaska or walleye pollock (MSC certified)
3. Bib or pouting
4. Black bream or porgy or seabream
5. Clam, American hardshell (from hand-gathered farmed sources only)
6. Clam, carpet shell (hand-gathered only)
7. Cockle (MSC certified)
8. Cod, Pacific (MSC certified)
9. Coley or saithe (from NE Arctic and combined N Sea stock)
10. Dab
11. Dover sole
12. Flounder
13. Gurnard (grey and red)
14. Lemon sole
15. Lobster, Mexican Baja California red rock
16. Lobster, Western Australian rock (MSC certified)
17. Lythe or pollack
18. Mackerel
19. Mahi Mahi (handline caught from targeted fisheries only)
20. Mussel (sustainably harvested or farmed e.g. rope grown))
21. Oyster (native & Pacific, sustainably farmed)
22. Pilchard or sardine, European
23. Red mullet (not from Mediterranean)
24. Salmon, Atlantic (Organically farmed)
25. Salmon, Pacific (MSC certified from Alaska)
26. Scallop (sustainably harvested e.g. dive-caught)
27. Scampi or Dublin Bay prawn
28. Seabass (line-caught and tagged)
29. Snapper, Red or Crimson
30. Spider crab (pot caught only)
31. Tilapia (sustainably farmed)
32. Trout (brown or sea and rainbow, Organically farmed)
33. Tuna, albacore (pole and line, handline or troll-caught from S Pacific or S Atlantic)
34. Tuna, skipjack (pole and line or handline-caught from Pacific (western & central) or Maldives)
35. Winkle (sustainably harvested e g. hand picked)