I'm loving this new challenge; taming the multi-pet themes is (are?) so much fun!
That said, I had the bug theme.
This theme was a lot of fun, a couple of the pets are ones I'm familiar with, the other two, not as much, so good fun all around. ^_^
First up was the pink wasp.
Decided to name her Sorbet, it was the first thing to come to mind and it stuck.
I've been on the fence about wasps, tried Huhuran and immediately found that her skin was not for me. >_< The silithid wasp model surprised me, I really love Sorbet. I used to think the pink color was just sort of bleh, but it's actually quite pretty once tamed. I love the color and design of her wings, the face style, and the black back patterns.
These guys are pretty active so if you're looking for a quiet pet to stand by your side, a wasp is probably not for you. I love the humming sound there wings make, almost seems kind of relaxing. They're not noisy fighters either, making standard silithid noises.
I could see the two second stun being kind of useful (being BM puts it at a 31.5 second CD), but situational, I think as its stun would put DR up for intimidation and any other stun your team in PvP might use. It might be useful in PvE to help try and peel a stray mob off a healer or squishy DPS.
On to the beetle.
For some reason the name Charles popped out at me and thus he has been named. XD
Beetles are one of those pets I'm kind of familiar with; I have a beetle and turtle on my main huntress.
For someone who's terrified of bugs in real life...I LOVE these beetles. I think they're absolutely adorable and have a ton of charm and personality to them.
I love Charles' coloring; these black and red guys look great and their coloring lights up differently depending on your lighting situation. I'm a big fan of the 'old world' beetle models; I love the new ones as well, but there's just something special about these guys.
Beetles are fabulous tank pets and I recommend one (or a turtle) to anyone looking to solo tough elites (I'd recommend a bear or MD+Mend Pet glyph for multi-target tanking). Shell shield and cower make these guy hardy as can be. Being tenacity they won't do much in the damage department so their niche is definitely for tanking, be it extreme soloing or picking up in a group when the actual tank goes down.
Now the silithid. I forgot how bouncy these guys can be!
I haven't run with a silithid in a long time, although I had one in WotLK for PvP. Once I found out the tan skin was turning common, I swapped out my regular silithid for a boss model.
I used to own a silithid of this exact color funnily enough, so I took a trip back out to Un'Goro to revisit my buddy Banana.
It's hard to get a still screen of an idle silithid, they're always bouncing everywhere. While this might annoy some people, I find it rather amusing (and far less annoying than the random kerthunk the boss models do when they idle).
When they walk, they hunch their bodies over and look like they're pouting almost, how funny! XD
I believe these guys were designed after the bug guys in Starship Troopers (and if not, they bear an uncanny resemblance XD). The yellow color is pretty neat even though Banana doesn't match Venjin at all.
Like all silithid style bugs, he also has a black pattern on his back/carapace. These guys are handy PvP pets and can even be useful in PvE if you're missing a priest. Venom Web Spray can also be used to save a clothie from a rogue mob trying to go smash them in the face.
And last but not least, the moth. ^_^
I've never had a moth before, just couldn't find the use/appeal for one. I feel like a changed hunter now. XD
Oh my goodness is this little brown and pink moth ever the most adorable little thing!
I've never thought of a moth as ferocious before, but I think little Faerie will be kicking ass and taking names.
I can see Serenity Dust coming in handy too and its spell lock lasts longer than a nether rays. Another plus is they can cast it from range, one downside is that it's on a 42 second cooldown (and that's as BM). One HUGE bonus to serenity dust is that the moth WILL smart cast it only when the mob they're attacking is casting an interruptable spell. Win!
Take this with a grain of salt though as if you leave it on autocast for PvP, you may only end up having the moth interrupt something trivial, but I still consider it a huge bonus that the moth can smart cast at all. ^_^
This challenge was so much fun Ache! I know for sure I'm keeping Faerie, and Sorbet will probably stick around too. Charles and Banana are neat, but I have a boss model silithid and beetle for Venjin already.
I'm game for another if you don't mind.
Name and Level: Venjin, 80
Exotics: Yes
Pet Slots: 9
No Restrictions
This theme (for future reference) will also generally include a Wasp for Ferocity--but not the Firefly model. Since you only wanted three and are too low-level to tame the waspy-model wasps, I did leave it out 
