[Crocolisks in the city] has changed a bit in 3.0.8, and could annoy many.
First off, as with the other fishing dailies, it takes multiple casts to reel in the quest fish. It took me 12 casts to get my Baby croc. I was fishing in Orgrimmar for Old crafty since I heard his drop rate increases to an almost guarentee. However, in those 12 casts. Old crafty did not appear once. It seems Blizzard have fixed this "bug" so having the quest will no longer drop Old crafty at an increased rate. This means, as far as I can see, people will have to go back to grinding for the Elusive fish of The Capital cities.
The [Shrimpin' Ain't Easy] quest, against my first impression, does not drop on every catch now. It will use the drop rate of Barbed Gill Trout as it replaces that fish on the catch table.
The [Felblood Fillet] quest now requires multiple casts. Caught one in 15 casts.
The [Bait Bandits] quest also requires multiple casts. Caught on in 7 casts (Confirmed by "Salty" Norrinir)
The quest [The one that got away] requires multiple casts. (Posted by Norrinir)
Seems the only quest really effected is [crocolisks in the city] in relation to Old crafty.