How to catch Glacierfish Junior | Stardew Valley

You need to have level 10 fishing skills with Advanced Iridium Rod and activate the Mr.Qi's Extended Family's quest at west of Ginger Island. You also need to purchase both Trap Bobber and Lead Bobber to facilitate fishing from Willy's Shop at Pelican Beach located at southeast of Stardew Valley. Now head to the path at the south of your farm and try to head southwest until you pass the Wizard's tower and also the abandoned house. Then head east of the abandoned house again until you reach the edge of an extended land next to the river in Cindersap Forest. The extended land where you can catch the fish is in Cindersap forest, and it is located at the southwest of Stardew Valley. Once you are there, cast your rod into the river at maximum level and wait patiently for the fish to bite. Do take note that other fish may bite the bait as well and that Glacierfish Junior is a very rare fish. You need to cast multiple times to catch it and unlike the other Legendary Fish where you can only catch them at particular season and in limited quantity, you can catch these fish multiple times at any season, as long you can have access to the Mr.Qi's Extended Family Quest that can be activated on Ginger Island.