pebble crab; Leucosia anatum
A species of pebble crab; the Japanese name is typically written in katakana.
The pebble crab (Leucosia anatum) is a small crab that lives in shallow sandy coastal waters.
Hiragana spelling, also acceptable but less common than katakana for this organism name.
The name ツノナガコブシ literally means 'long-horned fist', likely referring to the crab's appearance. The exact derivation is uncertain.