Hissing Chitterspine

Is this a rare spawn? No one else mentiones this being hard to find in the first place.

NM, just had to go to the right cave ....

Thank you for this information.  I just spent 3 hours trying to get this.  Will try again tomorrow.

I found 1, a blue rare, and as I was leaving I found another, a common. I captured both. So you CAN find more than one, even if you've captured one already

I'm guessing once you get one you aren't able to see any more.  There were a few in the cave but after I got the one everything disappeared.  Was trying to get a rare.

As a Protection Warrior I was able to fight the mobs, but even I came very close to dying mutiple times in here. Got a poor, then an uncommon and was gonna leave when another one spawned near me...rare. got it , got out. Never going back.

In reply to those looking for this pet, it spawns only in a cave called Chitterspine grotto.  Even with stealth, I managed to get ambushed by packs of 6-8 of the critters at a time and died twice.  The second being after I pulled a uncommon  P/P one out of the center.

There were two spawn points i saw in the cave. One deeper in had a constant pet to try to capture, the other random.  Good luck. I recommend stripping off gear to get this one.

Worgen rogue. Stealth all the way. Killed the mobs on the other side of the water. Battle with pet. Common. Heartstone out. No problems.

Even stelthed those invisicrabs are an ugly bunch! My Worgen rogue managed to get killed once and I was being super careful. The one I got was of poor quality but I ain't going back in that grotto without bulletproof doggie sweater! One misstep and like 15 will jump out of nowhere and murder all up in you're face!

FOR NON-STEALTH CLASSES:

1. If you go to the immediate left, there are a series of torches that respawn.You need to get to third one, and drop combat. There are two hissing chitterspine spawns near this point.

2. To drop combat, I found that I had to kill groups of 4-10 mobs at a time. You will need to continuously clear. 

3. Fight on a torch, and click it BEFORE your buff drops.

4. Remember that after your pet battle, you will pop with immedate aggro. Grab a torch and clear to exit.

I stealthed into the cave (from Cibi's comment - /way Nazjatar 42.4, 13.2 Chitterspine Grotto Entrance), died to a bunch of mobs who almost immediately found me. Came back in, hid in a corner till I could see the Hissing Chitterspine, stealthed to it, and battled/won it. Of course, I died immediately the battle was finished but it was worth it. :D

There are 2 torches just outside the cave.  If you click one you'll put it on your back, and it scares away the mobs inside the cave.  It doesn't last long, and you will probably still go into combat, so quickly find a spot close enough to reach the Hissing Chitterspine that keeps you OUT of combat and you should be good.  For some reason I had better luck getting out of combat by going down the ramp to the left, to the pool down there, than straight ahead.

Found it in the Chitterspine Grotto as a primary pet (green quality). Had others on the minimap, but the stealthing packs of mobs were annoying.

From Tyrsenus on Wowhead - 

Spent a good 5 hours battleing every pet on the island and still was unable to find one of these. anyone else have any luck?