sea grapes; green caviar
A type of edible green seaweed with small bead-like branches, often eaten raw in Okinawan cuisine.
In Okinawa, sea grapes are eaten in vinegared dishes or salads.
I like the popping texture of sea grapes.
Compound of 海 (umi, 'sea') and ぶどう (budō, 'grape'), from the grape-like appearance of the seaweed.