パイプウニ

noun

slate pencil urchin

A species of sea urchin with thick, pencil-like spines; scientific name Heterocentrotus mammillatus.

• パイプウニは、その太ふとい棘とげが特とく徴ちょう的てきなウニの一いっ種しゅです。

  The slate pencil urchin is a type of sea urchin characterized by its thick spines.