noun
striped shore crab
Refers specifically to the species Pachygrapsus crassipes, a common intertidal crab.
磯でイワガニをよく見かける。
I often see striped shore crabs on the rocky shore.
Compound of 岩 (iwa, 'rock') and 蟹 (kani, 'crab'), referring to its rocky shore habitat.