The US has delayed its decision to approve a new breed of fast-growing genetically modified (GM) salmon for human consumption. The salmon, owned by biotech company AquaBounty Technologies, has been genetically altered to grow faster than conventionally farmed salmon and would be the first GM animal allowed to be sold to and eaten by consumers. Campaigners say approval for the genetically modified salmon would carry ‘great risk’ and pave the way for more GM animals to enter the market