A new report by the Institute of Marine Sciences at the National Research Council in Barcelona links the rapid growth of jellyfish populations throughout the world's oceans to overfishing of their natural predators such as tuna and as a result of global warming.

Colman's in South Shields has been described as "the nearest thing to an eco-chippy you're likely to find", a fish and chip restaurant which only serves wild fish from sustainable grounds, uses additive-free vegetable oil and sends its waste fat to be made into bio-fuel. Noted for its welcoming atmosphere, Colman's has featured regularly for the past few years in the Times' Top 10 UK Fish and Chip Shops, and was voted Best UK Takeaway at the BBC Food and Farming Awards 2007.

Chefs Tom Aikens (on the right in the picture above) and Richard Ord, both key supporters of our Seafood See Life initiative, tell us why sourcing their seafood ingredients sustainably is so important to them. Their restaurants, Tom's Place in London and Colman's in South Shields, may be nearly 300 miles apart, but these distinctly different fish and chips establishments have more in common than first appearances suggest.

Do you like eating fish? Did you realise that around 75 per cent of the world's fish stocks are now fished to their limit or over-fished? While you can still eat some species of fish with a clear conscience, others are being rapidly fished close to extinction. Oxford-based band Stornoway has helpfully recorded a song that tells you which are which. 'The Good Fish Guide' is based on the Marine Conservation Society (MCS) guidelines to ethical fish consumption. It will shortly be released as a downloadable single via the Truck label, an environmentally proactive record label, with all profits to the MCS.

Callum Roberts, John Sauven, Antonio Carluccio, Raymond Blanc & Tom Aikens at last night's launch

Sustainable bouillabaisse today or jellyfish burgers tomorrow: a stark message from the celebrity chefs and marine experts at the launch of Greenpeace's latest initiative Seafood See Life at Old Billingsgate Fish Market in the heart of the City of London.