1A sea urchin (urchin animal); commonly called 'uni' when used as food.
海胆は潮間帯の岩場によく見られる。
Sea urchins are often found on rocky intertidal zones.
漁師が新鮮な海胆を籠に入れて持ち帰った。
The fisherman put fresh sea urchins into a basket and brought them back.
水族館で大きな海胆を観察した。
I observed a large sea urchin at the aquarium.
2Uni (seasoned sea urchin roe) used in cooking — typically the edible roe/ovaries, often salted or seasoned.
雲丹のパスタは濃厚な味で人気がある。
Uni pasta is popular for its rich flavor.
寿司屋で雲丹を頼んだら、新鮮でとろけるようだった。
I ordered uni at the sushi restaurant; it was fresh and melt-in-the-mouth.