arrowhead crab; halimeda crab
A species of decorator crab (Huenia heraldica) known for its leaf-like appearance. Used in marine biology and diving contexts.
I found an arrowhead crab while diving.
The arrowhead crab mimics seaweed.
Kanji spelling is rare and mainly found in older or specialized texts; the word is normally written in kana.
Variant kanji spelling, also rare.
The name 木の葉蟹 (コノハガニ) literally means 'leaf crab', referring to its leaf-like carapace. The exact derivation is uncertain, but it is a descriptive compound.