A red cod swims in the healthy kelp forest on Cashes Ledge

Note: This blog was originally posted on One World One Ocean as part of their National Sustainable Seafood Month Campaign. 

When you buy a piece of cod, do you wonder how many are left in the ocean? Are you curious about what kind of gear was used to catch the fish? Gillnets? Hooks? Or, maybe it was a bottom trawler? Do you consider a different choice – maybe there is a more sustainable fish to buy?

These are important questions to ask, but there’s something more basic to consider as well. Where do these fish live? What essential requirements do these animals have to survive and thrive in the ocean?

Figuring out what “sustainable seafood” means is a familiar dilemma for New Englanders. We have some of the most productive fisheries in the world, but we also have some of the most heavily fished areas in the world. New Englanders work very hard to manage our fisheries, and there is much we are still learning. Yet, there is one simple fact that scientists and many fishermen are very confident about – if fish don’t have healthy habitat, then we don’t have fish.

We have some very special ocean places in New England. Cashes Ledge, an underwater mountain range about 80 miles off the coast of Maine, is home to the deepest and largest continuous kelp forest in all offshore waters along the US east coast. Stretching 22 miles long and 17 miles wide, Cashes Ledge provides food and shelter to an enormous diversity of creatures – from bottom-dwelling tube worms and sponges to endangered North Atlantic right whales and highly migratory blue sharks and Atlantic bluefin tuna. Cashes Ledge is also rich in a variety of groundfish including Atlantic cod, white hake, monkfish, haddock, and redfish. Many kinds of offshore sea birds can be found dining here, such as sooty shearwaters and Wilson’s storm-petrels.

The reason for such enormous diversity and richness lies in the mountain range itself, whose pinnacles interrupt the primary Gulf of Maine current and create a stunning oceanographic phenomenon known as internal waves, which carry high levels of nutrients and oxygen from the sea surface to the sea floor. This unusual circulation pattern results in an incredibly productive ecosystem. It’s no wonder that scientists have used Cashes Ledge as an oceanographic research lab for decades. It represents one of the healthiest existing marine habitats, and if more of the ocean was like it, there would be a lot more fish.

In 2002 many habitat areas in the Gulf of Maine, including Cashes Ledge, were protected from harmful bottom trawling, and these areas have begun a slow recovery. But as large reductions in the catch of cod, yellowtail flounder, and other groundfish loom in New England, there is increasing pressure to open these areas again. Places like Cashes Ledge must be protected if we are going to keep relying on our oceans to feed us and allow our ocean ecosystems to regenerate and thrive. These are irreplaceable resources, and the permanent protection of marine habitat should be a top priority for any sustainable fisheries management plan.

While it is important to think about fish in numbers – how many we catch, how big they are, how many are left – it is equally important to consider the ecosystem on a larger scale, with all its moving parts, dependent on each other for survival. When do the plankton bloom, and where? Where are the currents taking the food? Where will certain fish spawn if their favorite ledge is dragged? How will the animals adapt to our warmer, more acidic oceans?

So, as we celebrate National “Sustainable” Seafood Month, take a moment to consider where your seafood lived before it was on your plate. The ocean ecosystems that produce the oxygen in 2 out of every 3 breaths we take, regulate our climate, drive tens of billions of dollars of economic benefits, and provide us with considerable recreational activities won’t continue to produce such benefits unless we do a better job at protecting the basic components of a healthy ocean. And, while you enjoy the good decision you made about your sustainably caught fish, also be thankful that the fish came from a good home, and do what you can to help keep it that way.

Help support habit protection for special places like Cashes Ledge – click here. 

July 17 – Local Summer Fisheries – Summer Flounder - Summer flounder, also known as fluke, can be found in New England’s shallow coastal waters in the summer months, when they migrate inshore from their deeper, offshore winter habitats. They have historically composed one of the most popular and important commercial and recreational fisheries on the east coast.

July 18 – A Tale of Two Cod - The almighty cod – the most legendary fish in our New England waters. Atlantic cod is greyish-green, and a renowned dweller of the Gulf of Maine. It is a staple of our traditional cuisine and a historic driver of our economy. You’ve seen an Atlantic cod, right? But have you ever seen a red Atlantic cod?

July 20 – Fish Talk in the News – Friday, July 20 – This week’s fish news includes: More news about the Maine lobster surplus; congressional delegates from New England states urge the House Committee on Natural Resources to use caution in determining 2013 groundfish quotas; innovative technology decreases environmental impact of sea scallop surveys; underutilized species may be key to sustainable seafood; Stellwagen Bank celebrates its 20th anniversary as a national marine sanctuary, New England Ocean Odyssey posts about red cod; marine mammal protection may play a role in perpetually low groundfish populations; controversy over the latest Georges Bank yellowtail flounder stock assessment; and a showing of the documentary Ocean Frontiers in Nahant, MA.

Here they are! Some of Brian’s first ever pictures of Cashes Ledge. Every picture tells a story – but we are lucky enough to have some real stories to tell about these awesome pictures. We caught up with Brian shortly after he visited Cashes Ledge and asked him about the dive. Brian filled us in on some of the exciting details of this bona fide ocean odyssey:

Robin: You’ve never dived Cashes Ledge before, what were your first impressions?

Brian: As always when I am diving in a new place for the first time, all I see is chaos when I first get on the bottom, but over time I begin to zero in on specific behaviors to start making order and begin to put the puzzle together.

The kelp is beautiful, the stalks are 6-8 feet high, then they have fronds that lay horizontally for probably 10-15 more feet. They create this sea of kelp, literally a bed of kelp that you see when you first come down from the surface that looks like the bottom but isn’t. The descent line we sent down just disappeared through it. You’d follow it down to the kelp bed then you’d have to go another 6 or 8 feet to get to the bottom. It’s a false bottom of kelp fronds. It’s a lovely golden amber color, and there’s another species of kelp that’s sort of reddish, growing on the amber ones. It all looked good and lush and thick – very colorful and healthy looking.

There were lots of fish circling around. We saw quite a few red cod. There are a lot of pollock and quite a number of cod mixed in, and some of the cod are more traditionally colored, but some have the distinctive red/orange iridescent coloration.

Robin: What other kinds of wildlife did you see?

Brian: Besides pollock and cod, there were a lot of juvenile fish. We found out later they were cunner. They are bright orange when they are small, quite stunning, like the garibaldi in California. We saw quite a few whales on the surface, minke whales porpoising and coming up for air, but not close enough to photograph. There were invertebrates on the bottom, on ledges below the kelp. It’s definitely worth a lot more exploration. This is clearly a unique habitat.

Robin: Was this dive different from your expectations?

Brian: I’d heard about the Cashes Ledge kelp forest for years. People always say it’s not like California, so I expected an area that was covered in kelp on the bottom, but the brown kind that I usually see inshore, just a lot more of it – low-lying, a foot off the bottom. I didn’t expect anything like this. Stalks of kelp that were 8 feet high and long strands at the top that made this golden bed. It was very unique. The fish stayed localized, always in the area. They weren’t passing schools; they sort of hung out there. The kelp forest is probably a square mile or so – it’s a big area. But the fish were always there – in the background, silhouetted. It was very different from what I expected.

Robin: Did you see evidence of human activity in the area?

Brian: There was a tremendous amount of fishing gear out there. We tried to dive away from gear. But everybody on the trip remarked that there were a lot of fishing buoys on the surface. I think they were lobster traps, but I’m not sure. They were everywhere. This was surprising. Nobody expected this. A friend of mine remembers diving Cashes in the 80s, and said the fish used to be so thick that you couldn’t see your dive buddies. It’s not like that today, so the biomass must be down. But there was a good population of fish. I think a place like this with proper protection could come back to those levels that my friend observed 20-30 years ago.

Robin: Were there any unexpected difficulties?

Brian: No, but the currents got quite strong on Sunday and we had trouble getting to the dive-line buoy. Wearing a dry suit and 120 pounds of equipment you have to swim really hard against the current. We couldn’t get to the buoy, so the boat picked us up and we tried again and made it.

Robin: What was the water temperature?

Brian: Pretty warm for New England, probably 50 degrees.

Robin: Did the weather cause any problems?

Brian: No, the weather was really good. It progressively improved. Early Saturday it was fine, small waves, a little bumpy, but it got better and by Sunday was really calm. If the waves are big it’s hard to get back in the boat after the dive.

Robin: Was visibility low from the recent northeaster?

Brian: I don’t know why visibility was low. It was very typical of New England conditions. Turbid, but not terrible. Visibility was 20-25 feet, but hazy, not crystal clear. I tried to work close in and make some pictures that would still come out well.

Robin: Will you do anything differently next time you go to Cashes?

Brian: Not necessarily. I would like to have more time. To produce pictures in these conditions takes a lot of repeatability and serendipity. My M.O. is to dive a place over and over and keep working it, if I can. I could spend hours and hours working those fish. I’m very intrigued by the red cod. They are highly unique and beautiful with the golden kelp backdrop and green water. I would just like to do more of it.

Are you intrigued by the red cod, too? We will give you a look at those fascinating fish soon. In the meantime, enjoy some of these other sublime pictures Brian made in this vibrant special place in the Gulf of Maine!

This post was originally published on New England Ocean Odyssey.