spiny oyster; Saccostrea kegaki
A species of small, spiny oyster. The name is usually written in katakana as ケガキ.
The kegaki is a small bivalve that attaches to rocks in the intertidal zone.
Katakana spelling is common for this organism name; usually written in kana.
Kanji spelling is rare; the word is usually written in kana.
Usually written 毛牡蠣, from 毛 “hair” and 牡蠣 “oyster,” referring to the conspicuous bristle-like projections on its shell.