Aquatic Battler of the Dragon Isles

Since Arcantus is a Magic pet i decided to use a team of aquatic pets that have beast and critter abilities.
I used Chitterspine Skitterling (2/2/2), Bloodseeker (2/2/x), Chitterspine Deepstalker (1/1/x)
1. Black claw
2. Swarm, Chitterspine Skitterling dies
3. Bring Bloodseeker in and use Bubble
4. Sneak attack 4x
5. If Bloodseeker survived use another Sneak attack, otherwise use Skitter from your Chitterspine Deepstalker
Arcantus should be dead now. I only needed one attack with my third pet

For Bakhushek I used a "slimy" aquatic pet like Slimy eel (1/2/1) and Slimy Fangtooth (1/2/1) since they all have magic abilities and an aquatic pet with a mechanical ability. I used Hydraling (x/1/x)
1. Moonfire
2. Sewage Eruption
3. Ooze touch but Slimy eel dies.
4. Bring in Slimy Fangtooth and cast Moonfire, Skritches should die (otherwise use another Ooze touch)
5. Phantus comes in, use Sewage Eruption
6. Ooze touch 2x
7. anything because Slimy Fangtooth will die but I recommend Moonfire in case he gets the cast off
8. Hydraling comes in, use Call Lightning and Phantus dies

Enyobon was one of the easy ones if you have 3 slimy pets like on Bakhushek. I used Slimy Hermit Crab (2/2/1), Slimy Sea Slug (1/2/2) and Slimy Fangtooth (1/x/x)
1. Moonfire
2. Sewage Eruption
3. Nether Blast 2x
4. Moonfire and Slimy Hermit Crab died, pick Slimy Sea Slug next
5. Expunge
6. Finish it with Ooze touch (you might need your 3rd pet but that's RNG related, keep on using Ooze touch)

For Patchu I used Abyssal Eel (2/1/2), Inland Croaker (2/1/1) and Spawn of G'nathus (2/2/2)
1. Pump (he does a shield)
2. Squeeze
3. Water Jet
4. Pump (Anubisath Idol dies)
5. Pump
6. Water Jet 2x (he placed a 2 times hit decoy)
7. Pump and Abyssal Eel dies, bring in Inland Croaker
8. Call Blizzard
9. Ice Lance (Mechanical pandaren dragonlings failsafe triggers, ice lance should hit a second time and kill him. If not use it again)
10. Ice Tomb
11. Ice Lance
12. Ice Lance (Inland Croaker will die before it goes off, but Ice Tomb will hit this round anyway)
13. Spawn of G'nathus will come in, use Paralyzing Shock and Spectral Tiger cub dies

Ok so Swog was pretty hard to get right and is quite a long fight. He takes extra damage from flying abilities, which aren't seen often in aquatic pets. My setup is Bloodseeker (2/2/2), Abyssal Slitherling (2/1/1) and Sandyback Crawler (1/x/2)
1. Sneak attack
2. Dive
3. Sneak attack 2x
4. Bubble
5. Sneak attack
6. Dive
7. Sneak attack
8. Sneak attack (bubble disappears)
9. Sneak attack
10. whatever because Bloodseeker will die before you can get your attack in
11. Bring Abyssal Slitherling in and use Toxic Skin
12. Squeeze
13. Water jet until your pet dies, Sandyback Crawler will come in
14. Sandstorm
15. Pinch 5x until you can use sandstorm again
16. Sandstorm and Swog should die

I have been trying to finish this achievement for hours until I realized I wasn't getting credit for multiple pet battles. Seems like this is bugged. I received a copy paste answer from Blizzard with no solution.

it looks like the achiev is bugged, ye... I can't manage to get the achiev for Aquatic Battler even if I win against Patchu (the last one I need) with a proper team.