June 9, 2021 — In recent weeks, a new $50m (£35m) hybrid vessel set sail from Mauritius and headed out into the Southern Ocean where the crew will spend three months longline fishing for the Patagonian toothfish. By the time the fish are brought back, processed and sent to customers, consumers will know where and when that specific fish was caught, which boat landed it, who processed it and which certifications have been met. The technology enabling this is blockchain.
“From the day it’s landed to when it ends up on someone’s plate, blockchain gives toothfish traceability right from the start,” says Steve Paku, captain of the Cape Arkona. “People can just scan the barcode and the whole story is right there in front of them.”
Blockchain is just one way that fisheries are trying to ensure better traceability from hook to plate but it is garnering a lot of interest. Blockchain cannot be tampered with and the data can be accessed by everyone along the supply chain, from certification schemes to the final consumer. Because it is digital, decentralised and updated in real time, a blockchain tag contains valuable information that a physical label never could. In combination with DNA testing to prove the specific species of fish, blockchain could play a role in reducing fraud in the seafood industry.
This also matters from a conservation perspective. More than a third of fish populations are overfished, according to the UN’s Food and Agriculture Organization(FAO). Guaranteeing where and how a fish has been caught can help ensure that the catch has been made in an area with sustainable fish populations. It can also help tackle the problem of bycatch. In degrading marine ecosystems, bycatch is detrimental to biodiversity and puts additional, unnecessary strain on marine wildlife. Young fish get caught up in nets with too small a mesh, turtles and dolphins can get entangled in gillnets, and seabirds, including endangered albatross, get injured by hooks unless deterrents are put in place.