--- SEA GRAPES / AMIBUDO / GREEN CAVIAR --- Sea grapes, also known as Umibudo, is a tropical aquatic vegetable that is very popular in Japan where it is considered a delicacy. It is highly regarded for its succulent appearance, refreshing taste and pleasing â??popâ?? when you eat it. The sea grapes seem to almost explode in the mouth releasing a unique flavor of the sea!