Have just come across School of Fish ( http://www.school-of-fish.co.uk), it’s a great website if you’re doing anything related to the sea, sea life, or sustainability. These are some of the topic covered: Litter, Sustainability, Eco-systems, food chains, our amazing seas, food for health and the perfect catch. There are videos, fact files, games and lesson plans. The content is really good. Well worth a look. It's by M & S in partnership with the MCS.