Giant Sewer Rat

I fished mine up next to Cantrips & Crows today, in Dalaran (Northrend), version 9.0.5.

As of 8.3, this still drops. Got it on my 74th cast, I consider myself lucky.

I've been looking for a strong critter, and this guy definitely fits the bill. 341 power is awesome with stampede. What he lacks is speed, which isn't surprising. Would be a much better battler if crouch were in the 2nd slot. With such a slow per flurry is wasted. 

Confirmed it still drops in Northrend sewers, Fished at Catrips and Crows for about a half hour when mine dropped, it dropped by itself and I got the achievement.

I'm struggling trying to get down there. I'm back from a long hiatus of playing and everytime I head down into the sewers I get killed. How do I get down there without dying? I've been trying to get this guys for YEARS and still don't have him . So frustrating. :(

Took 6 casts while reading comments about it here..lol lucky

Got mine yesterday in Northrend Dalaran sewers. Probably in the 200 to 300 range of casts.

I can confirm that this is still in the loot table if you fish outside of the red or green schools at the Black Market in the new Underbelly of Dalaran (Legion 2017). Just got mine closer to 1000 casts. Good luck out there! Don´t give up :3

Got to about 500 casts and was about to call it a night after my worm supreme buff ran out and got him in the last 12 seconds of it. Cool pet, looks huge when you give it the magic biscuit.

I wonder if this will still be available when Legion releases and Dalaran moves (again)?

Took 879 casts but I finally got it.  

A very powerful pet with no abilities which take avantage of that. Do not battle this pet. 

started fisging with a skill of about 350 and got the rat after about 120 tries.

here's what i also got:

sickly fish * 10

I spent over an hour and a half fishing for him in the Dalaran fountain only to find out that only the edges have the sewer loot tables, so I broke down and grabbed him from the AH. I don't care that I didn't get the achievement; I got a giant rat for my Critter team and that's what matters.

I set out to catch this in the Black Market with my fishing at around 85. It took me 5 days and a ton of trys. I eventually caught it off of the dock near Crows Tavern shortly after I hit 600 on my fishing skill. It will pop up but expect to try more then a 1000 times before it actually pops up, specially if you start low like i did. 

Woot Finaly got this guy, spend many hours in Cataclysm times trying to fish this up and finally got him today after around 150 casts :)

I got mine from the BMAH for 1400g, making Breanni proud by getting another Pet, but making El sad by not getting it from actually fishing myself.

Got it today in the Fountain while fishing for coins. 

Finally got this guy today!

Took me 3248 casts @ about 3.8 a minute. That's about 855 minutes or 14.25 hours. Was it worth it? Depends how important achievements are to you. I found one on the AH for 2k and I'd say buying that would definitely be better value if I didn't care about the achievement.

My advice: Find something you can do while you're fishing. I played keno pop on a java games website. Fishing is awful, keno pop is awful, but if I put them together I'm moderately entertained!