Hairy crab season is autumn. To be more specific, they are fished between the ninth and tenth lunar months. It is during this time that the crabs migrate from the fresh river waters to the ocean for mating later in winter. Hairy crabs are adored for their rich orange roe, and autumn is when the female crustaceans produce the most roe. Just like Christmas, this period only comes once a year and it is much anticipated by the locals. In other words, get them while they’re hot!