Fine G.Agnak Fin

Drop by Glacial Agnaktor (G-Rank)

Tail Carves (x1): 27% drop chance

Break Dorsal Fin: 61% drop chance

Capture: 23% drop chance

Free Hunt: 23% drop chance

source: http://monsterhunter.wikia.com/wiki/Glacial_Agnaktor_Carves