noun
black longspine urchin; Diadema setosum
A species of sea urchin with long, black spines, found in the Indo-Pacific. The name is used in biological and diving contexts.
ガンガゼは長い黒いトゲを持つウニの一種です。
The black longspine urchin is a type of sea urchin with long black spines.
General term for sea urchins; ガンガゼ is a specific species.
The origin of the name ガンガゼ is uncertain. It may be derived from the appearance or habitat of the urchin, but no clear etymology is established.