When it comes to expensive delicacies, one my favourites is sea urchin, or uni in Japanese. If I see it on a menu, I'm almost sure to order it. Because its delicate flavour is so elusive ...
For sea urchin divers who harvest them as premium shellfish ... They’ve been experimenting with feeding them different types of seaweed; on average it’s taking them about 8 weeks to get them big ...