In my experience i got the following: (150 Total loot)

Raw Redgill                        67 (44.67%)
Raw Sunscale Salmon      48 (32.00%)
Lightning Eel                      14 (09.33%)
Oily Blackmouth                10 (06.67%)
Raw Mithril Head Trout    10 (06.67%)
Greater Mana Potion        01 (00.66%)

I Fished here for the Salmon & the Nightfin Snapper, but guess the Nightfin are gone.