After battling my way through the dungeon (minus the last battle)to get to the fishing hole, I spent almost 5 hours at the fishing hole trying to get Mushushi. I used Summon, Winnow except level 2 which cleared the pond to 1-5 fish, and then reveal. Caught the remaining fish except those who got away in a clear area?(why)? I refilled energy many times. Lots of crowns used. After 5 hours I had one page of Samurai, one page of Origami which is rare, and many many pages of Grape Jellyfish. I did have to mark the spot and go sell the grape jellyfish and then go to the bazaar and spend some gold so I wouldn't go over the limit. Then I would go back to the fishing hole and try again. Five hours and no Mushushi. I seriously think the spawn rate needs to be adjusted. I was using my wizard Travis Firefist if you(KI) want to verify on 9/5/2016 from 5pm maybe a bit before to 10pm.
I also need Goldfinger and running into the same problem there. ---very low, if at all, spawn rate. Please KingsIsle adjust the spawn rate on these 2 fish. Thanks. Oh I read Undead Spyre Eel is very difficult to catch too. I haven't done much fishing in Dragonspyre yet.