Secret Fish and Where to Find Them

This is part 2 of the secret fish achievement series.
To start this you'll need to complete part 1.

The goggles:
With the [item=167698] buff applied a small fish in a bubble will spawn somewhere within 40 yards of you. If you have sound on you'll hear bubbles when it spawns then 5-10 seconds later the fish will become visible at which point you'll be able to click it. The fish can be clicked while mounted, you do not need to be in water for it to spawn and it will spawn every 25-30 seconds.

Best way to do this is find a spot that is flat and with few surrounding objects (trees, rocks, etc) and just spin your camera around until you see the bubble.

The Fish!
Each time you click the puffer you'll be given a random fish, most of the time it will be the white "junk" fish for whichever area you're in as well as the occasional grey item, with the exception of Dalaran where you'll commonly get coins usually caught from the eventide fountains.

Catchrate is quite low for many of these so expect to spend a fair amount of time for this.

I've split the fish into different catergories.

The common:
These fish can be caught anywhere at any time of the day, save these lot for last as you'll probably get most if not all of them hunting the others.
1. [item=167717]
2. [item=167729]
3. [item=167730]
4. [item=167716]
5. [item=167720]
6. [item=167718]
7. [item=167714]
8. [item=167721]
If you're still missing these after you catch the others, the best places to catch these are on the floating islands, like the ones scattered around Outland Nagrand (45.9, 59.9). Stand on the edge of the island and the fish will spawn in an arc around your character, shown here in green (Dalaran island used for an example): https://i.imgur.com/vrIYGgB.jpg

The zone exclusive:
These fish can only be caught in specific zones and sometimes even in very specific areas within zones.
9. [item=167712] - Nazmir, Zul'Nazman.
10. [item=167706] - Jade Forest.
11. [item=167723] - Isle of Thunder.
12. [item=167707] - Dalaran (Broken Isles/Northrend).
13. [item=167705] - Mechagon.
14. [item=167728] - Nazjatar.
15. [item=167708] - Suramar. Anywhere in the Suramar city harbour. (Credit to Roguezs).
16. [item=167722] - Tol Barad (PvP area). Anywhere in the zone, the bridge that connects the two islands is a great place for this one, just make sure you're on the PvP area side of it (check minimap).
17. [item=167710] - Howling Fjord.
18. [item=167711] - Argus, Krokuun and Antoran Wastes. (Credit to Padwarle and Neryssa).
19. [item=167724] - Drustvar, under Anyport in the underwater Tortollan bar called 'The Drunk Tank'.
20. [item=169897] - Neverest Pinnacle, Kun-Lai Summit. (Credit to Qaccy and Pungyo).
21. [item=169898] - Mount Hyjal, in the lake under Nordassil.
22. [item=167709] - Drowned Lands (46, 50) in Stormsong Valley. (Credit to Bobins666).
Note: With the exception of the Tank Deweller (Fish 19), these are confirmed locations and may not be the only location within the zones where they can be caught. For the Tortollan Tank Deweller, I was only able to catch it once I was in the very specific sub-zone (where the name changes above the minimap).

For those suffering from woeful luck with the rarer fish, like the [item=169897], this was discovered by Asmundr.

To everyone who is having trouble looting some fish. You need to approach the places like Neverest and Nordrassil on foot without a flying mount (There is a small path just before the Neverest peak) Then the 100% dropchance Fishes don't bug out and are lootable once more (Thin Air Flounder and Well Lurker) Alternatively just use the goggles when standing at those places when they are off CD.

If you're still having issues, clearing your bags of all secret fish (vendor or delete them) may also fix it.

The time scheduled:
These fish can only be caught within certain times, while one is active, the other is not. Whichever fish is active at the time can be caught in any zone.
23. [item=167715] - Night only. 9:30pm to 8am.
24. [item=167719] - Day only. 8am to 9:30pm.
Note: We're not sure on the specific day/night switch over time, the above is just based on the times we've been catching them. If you catch these outside of the posted times let me know. Make sure its server time, not your local time.

The dead:
These fish can only be caught while the player is dead. Once you're a ghost these fish can be caught in any zone. (Credit to FenixInfinito).
25. [item=167713]
26. [item=167727]
27. [item=167726]
28. [item=167725]
Best place to catch these on any floating island, like the one directly behind the southern bank of Broken Isles Dalaran. Suicide by flying up and dismounting. This zone has ghost flying and if you stand on the edge of the island the fish will spawn in an arc around your character, shown here in green: https://i.imgur.com/vrIYGgB.jpg

The buffed:
29. [item=169884] - Requires the [spell=294250] buff from the Mechagon mechanocat painting station (63, 42). This can be applied by walking over the green puddle on the station or having another player throw a Green Paint Filled Bladder at you. (Credit to Sishrot).

The sporadic:
30. [item=169870] - Can be caught in the "future" version of Mechagon that [npc=153993] sends you to for the quest The Other Place. Unfortunately this daily is only available sporadically. (Credit to Lacrit).

That's all folks!
Thanks to everyone who helped with the hunt :)

Just to clarify.. you don't actually fish for these. I spent an embarrassing amount of time trying to fish these guys out lol

I was not having luck on the island outside of Dalaran for the ones that can be caught anywhere. I found a good spot in the Jade Forest around 39.7, 40.0. on the bridge to the Gong of Hope. Stand at the base of the steps, looking down the bridge and they will always spawn on the bridge. There are no obstructions and no mob spawns. In the Jade Forest you will always loot 2 fish per bubble also. Your second fish will always be a BFA fish also, so you will have a nice stack to put up on the AH. In 1 hour I looted 26 rares and finished off the rares that cane be caught anywhere .... just need the daily from Chromie now