User blog comment:BannedLagiacrus/Monster Appreciation Week: Emerald Congalala(4th Gen)/@comment-25119729-20151114151022/@comment-4899131-20151115003959

@ Blazing: The high rank E.Congala Pelt+ description in the English version is basically the same, just says durable rather than robust, so that does pretty much answer the guild's mystery