Can We Protect Deep Ocean Species Before We Destroy Them?


----------- Sponsored Links -----------
----------- Sponsored Links -----------

Dear EarthTalk: Recent news reports have revealed the discovery of previously unknown species inhabiting the deepest parts of our oceans. Is anything being done to protect this habitat before humans have a chance to fish it to death or otherwise destroy it?

Unfortunately it may already be too late for some of the deep sea’s undiscovered life forms. Advances in so-called “bottom trawling” technology in recent years has meant that fishing boats now have unprecedented access to deep ocean habitats and the sea floor itself where untold numbers of unknown species have been making a living for eons. Scientists speculate that upwards of 10 million different species may inhabit the deep sea. This is biodiversity comparable to the world’s richest tropical rainforests.

The Deep Sea Conservation Coalition (DSCC), a group of more than 50 environmental and other groups dedicated to protecting cold-water corals and vulnerable deep-sea ecosystems, reports that trawlers today are capable of fishing deep sea canyons and rough seafloors that were once avoided for fear of damaging nets. “To capture one or two target commercial species, deep-sea bottom trawl fishing vessels drag huge nets armed with steel plates and heavy rollers across the seabed, plowing up and pulverizing everything in their path,” the coalition reports. In addition, adds DSCC, large quantities of coral and unwanted fish species are hauled up only to be thrown back dead or dying. Indeed, the result of a few hours of trawling can be the destruction of fragile deep-sea habitats, such as delicate coral and sponge communities, that may have taken centuries to grow and thrive.

Bottom trawling also stirs up the sediment at the bottom of the sea. The resulting undersea plumes of “suspended solids” can drift with the current for tens of miles from the source of the trawling, introducing turbidity throughout the water that inhibits the transfer of light down to the depths where it is needed for photosynthesis in plankton, sea kelp and other undersea plants that serve as the basis for the marine food chain. Also, ocean sediments serve as natural safe resting places for many persistent organic pollutants (such as DDT and PCBs). Dredging these sediments up effectively reintroduces such toxins into the water where they are unwittingly absorbed and consumed by the fish we eat and other marine life already trying to cope with otherwise compromised undersea habitats. The sediment plumes also reintroduce nutrient solids from agricultural and other practices, increasing demand for oxygen in the water (causing algae blooms) and contributing to the outbreak of ocean “dead zones” devoid of marine life.

What can be done? For its part, the United States has banned bottom trawling in its offshore jurisdictions, but the practice continues mostly unabated throughout Europe and out on the world’s high seas. DSCC has gotten upwards of 1,400 marine scientists from 69 different countries to sign onto a statement expressing profound concern “that human activities, particularly bottom trawling, are causing unprecedented damage to the deep-sea coral and sponge communities on continental plateaus and slopes, and on seamounts and mid-ocean ridges.” The statement calls on governments and the United Nations to adopt a short-term global moratorium on deep sea bottom trawling to try to provide immediate protection to the mostly undiscovered biodiversity of deep sea ecosystems while governments hash out longer term conservation and management regimes. In the meantime, bottom trawling continues unabated in sensitive areas of the North Atlantic and elsewhere, harvesting now for us what our grandchildren may never know.


EarthTalk® is written and edited by Roddy Scheer and Doug Moss and is a registered trademark of E – The Environmental Magazine ( Send questions to: Subscribe:; Free Trial Issue:

----------- Sponsored Links -----------
----------- Sponsored Links -----------


  1. The answer is simple! Don’t eat fish! Go vegan and end this destruction.

    Anyone who thinks that any form of fishing is sustainable needs to take a good hard look at the facts. Stop eating fish! We don’t have to eat it and it’s killing our oceans.

  2. Man leaves nothing untouched and exploited.
    With a balance and proper protection we should be able to eat fish but this over fishing with millions dying for no reason is ridiculous. Destruction of habitats is going to be the end of us all.. simple as that.
    There might not even be any grandchildren in the future if we carry on like this.

  3. Going vegan is fine and well. However, the rest of the world has hardly heard of this, and we live in a country whose highest nutritional standards keep emphasizing a diet of fish.

    The ocean needs its own protectorate forces with nature at the center, not trade. Laws to enhance the ocean’s biology along with a regulatory force is really what enlightened humans must push for.

    Cultural change could come from really high-priced scarce fish. However, I think the capitalists would exploit scarcity and plunder the rarest species. Cultural change could come from go vegan, but I think there are too many blood-thirsty fiends out there to make much of a dent. Cultural change could come from knowledge but that will take way too long and people do not care much about what they haven’t known.

    I honestly think it needs to come from the top down and not the bottom up. There has to be a commitment by the internationally powerful to say enough and create a powerful and competent instituiton to fight against all countries of fisherpersons and those persons who feed off them.

  4. “…and we live in a country whose highest nutritional standards keep emphasizing a diet of fish.”

    I had to laugh out loud at that one. North America has one of the highest rates of diet-related diseases in the WORLD. We don’t have high nutritional standards and the powers that be only tell you that dairy, fish, meat and GMO foods are good for you because they can profit from it.

    Fish is among the most polluted foods on the planet and there are no benefits to be had from fish that can’t be obtained from sustainable plant-sources (i.e. omega-3 oil, DHA, etc.).

    So the solution always comes back to moving to a plant-based diet. It’s easy and everyone wins!

Leave a reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.