Ok, so I do the fishing daily whenever it's either the Crocolisks in the City or Shrimpin' Ain't Easy. I do the shrimpin' quest to lvl my fishing and the Crocolisk quest because I want the pets (more on my quest for non-combat pets latter in the week).
Not once have I gotten any of the four Crocolisk pets. Not once! I've gotten the Weather-Beaten Hat (~1.0% drop rate). I've gotten The 2 Ring (~0.1% drop rate). The 2 @#$% Ring!! But no pets?!
Ok, so I know that probability doesn't work like that, but I'm skill angry.