“I’ve tasted it, and it’s great. If I had to put a flavour on it, I’d say it’s slightly umami,” says Peter Rowe, chief executive of biotech firm Deep Branch. Mr Rowe clearly takes his work seriously, as he is not talking about food for humans. Mr Rowe and his partners are trying to reduce the carbon footprint of animal feed which is often shipped around the world. In the case of fishmeal, anchovies are caught off the Pacific coast of Peru and Chile, processed and shipped around the world. Similarly, soy plantations in Brazil or Argentina may involve clearing forest and require large quantities of fertilizer, heavy usage of agricultural machinery, and again, long-distance shipping.