You can support deep-sea conservation by understanding how seafloor habitats are protected and checking seafood recommendations against the actual species, source, and fishing or farming method. A fish’s name alone cannot tell you whether a particular seafood choice is recommended.
Why deep-sea corals and sponges matter
Deep-sea corals occur from about 150 feet to more than 10,000 feet below sea level, according to NOAA Fisheries. Coral and sponge communities provide habitat for fish, shrimp, crabs, and other animals, including species used by fisheries. Yet much of the seafloor remains unmapped: NOAA says less than 0.05% has been mapped. That figure describes mapped seafloor, not the share of coral habitat that is known.
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Some deep-sea corals grow only a few millimeters per year, and some specimens are thousands of years old. NOAA says trawling can reduce coral gardens to rubble; recovery may take hundreds of years, if it happens at all. Undersea cables and oil and gas exploration can also damage habitat. NOAA notes that effects from mineral extraction and other environmental changes have not been studied in depth, so their scale should not be assumed.
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How fishing can affect deep-sea habitat
Bottom-tending gear can contact the seafloor, where fragile corals and sponges may grow. That does not mean all deep-sea fishing has the same impact: gear, location, and the rules applying to a fishery matter. For example, NOAA’s 2021 New England rule restricted specified bottom-tending commercial gear in designated areas while allowing stated exceptions. The bulletin says the rule took effect July 26, 2021; it is an example of place-based regulation, not a complete or necessarily current account of all closures.
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What coral protection areas do
Managers can limit gear that contacts the seafloor in particular places and tailor exceptions to local fisheries. NOAA’s New England rule illustrates how those choices differ by area:
| Area or measure | What the 2021 rule described |
|---|---|
| Georges Bank Deep-Sea Coral Protection Area | Restricted bottom-tending commercial fishing gear, with an exception for red crab pot gear. |
| Mount Desert Rock and Outer Schoodic Ridge areas | Barred bottom-tending mobile gear while allowing lobster trap fishing. |
| Jordan Basin | Established a dedicated habitat research area. |
Another example comes from the South Atlantic: NOAA says the regional fishery council designated five deep-sea coral Habitat Areas of Particular Concern in 2010. Together, they cover roughly 60,000 square kilometers between North Carolina and the Florida Keys and support biodiversity and habitat for fish and invertebrates. See NOAA’s South Atlantic overview. Check current regulations for the location and fishery you are asking about.
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How to check a seafood choice
Seafood Watch recommends asking about seafood, looking up the particular choice, choosing a current Best Choice when available, and considering a recommended alternative if it is not. Its consumer guidance and Central Consumer Guide, March 2026 can help you match a purchase to current recommendations. Guidance changes, so check the latest applicable entry when you shop.
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Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →- Ask where and how it was produced. Find out the species, whether it is wild-caught or farmed, its location or stock where available, and the fishing or farming method.
- Match those details to a current recommendation. Search for the species and source, rather than relying on a common name alone. Recommendations may distinguish different fisheries, farms, locations, or methods for the same named seafood.
- Choose a Best Choice if the match is available. If it is not, check the guide for a recommended alternative that fits the information you have.
- Ask what the recommendation says about impacts. Where the entry addresses them, consider habitat effects, bycatch, and stock status alongside the species name.
At a fish counter or restaurant, useful questions include: “What species is this?” “Where was it caught or farmed?” and “What gear or farming method was used?” If staff cannot provide enough detail to match the item to current guidance, the recommendation for that specific source cannot be confirmed.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to interpret sustainability claims
NOAA Fisheries defines sustainable seafood as “wild-caught or farmed seafood that is harvested or produced in ways that protect the long-term health of species populations and ecosystems.” That definition concerns both populations and ecosystems; it is not a rating for every item bearing a particular species name.
NOAA says U.S. wild-capture fisheries are scientifically monitored, regionally managed, and legally enforced under national sustainability standards. Fishery-management plans aim to prevent overfishing, rebuild depleted stocks, minimize bycatch and interactions with protected species, and conserve essential fish habitat. This is management context, not evidence that every U.S. fishery or seafood item has the same impact. NOAA also notes that management must adapt to new science and changing ocean conditions.
For more on its habitat work, NOAA says its Deep Sea Coral Research and Technology Program “builds a bridge between research results and applied conservation programs.”
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