Fish you absolutely regret/hate never want to keep again.

[OrchidMiss]

Orchid Dottyback

You ever see a fish try to eat a goby that's 80% of its size whole?

That's why I chose that fish to be the only fish in my mantis tank!

 

[AydenLincoln]

Puffer

Puffers are the best! They just need their own fowlr tanks if you tried to put one in a reef that was your problem because they aren’t and have never been reef-safe.

 

[SpyC]

Why? Just their propensity to bury corals, or another reason?

Due to dietary needs I don't think they should be kept in captivity

 

[NewbieC123]

Powder blue rang

Flame Hawk

Clowns in general

Red coris wrasse- Gorgeous fish but will flip every coral and frag it can in search of food

Why the flame hawk?

 

[vetteguy53081]

Why the flame hawk?

It will hunt and kill certain fish, kill all shrimp and hog all the food. Very sneaky devil

 

[i cant think]

I have a few.

1) Yasha Goby. Bought it and the thing immediately hid. I saw it peek out once for about 5 seconds a couple weeks later, then never saw it again. At some point, the idiot swam into the tiny emergency relief holes around the return pump eyelet and got stuck in the flow diverter attached to the eyelet. The only reason I know this is because after eons of not seeing the fish, I was cleaning the tank and when I removed the flow diverter I found what was left of the carcass stuck inside. What a waste of $70. If your tank has ANY holes a fish can potentially fit in, there's a good chance it'll try.

Usually they hide if it’s an active tank. Mine have all come out of hiding in my nano within 1-2 weeks of settling in. Heres my current one

2) Flame Hawkfish. It's fine (so far) with my clowns and cardinals, but it murdered both black mollies within the first 2 weeks they were in the tank together. The mollies were the sweetest little fish who just wanted to swim about and nibble on the rock work and sandbed. The hawk apparently thinks the sandbed and rock work are its property and will murder anything that touches either one. One Molly it bit off its entire tail down to the meat and the other, it took a gigantic bite out of its belly. Both were dead within 24 hours of the attack. I hope it doesn't decide the other fish in the tank deserve death, because if it does, this fish is getting the boot.

Honestly, any hawkfish is on my list of no’s. All the ones I’ve had and have mixed with wrasses made a b-line for them.
I’ve lost 2-3 of my own wrasses and had to separate hawkfish with wrasses in LFSs. They seem to love hunting down Macropharyngodon and Paracheilinus species. My Lyretail wiped out my male Iridis as well.

 

[kc4mnp]

Snowflake Eel, found out after I got it that it would eat anything I put in the Tank, and He terrorized my Tank for 22 Long glorious years !
Still miss him mean as he was, He had real character, even went carpet surfing one night and survived !

 

[kdx7214]

Clowns without a doubt. I had a black percula for 17 years or so. It was great as a juvenile and male. Would play in between my fingers and was very friendly. Then it became female. Holy crap was she mean. She took over the entire 75g tank for her territory and would bite hunks out of your hand if you tried to clean the tank. I still have a couple of scars from that little lady. Finally had to move and gave her to a friend.

 

[shcrimps]

clownfish, clown goby, green chromis

 

[i cant think]

Why the flame hawk?

Hawkfish are nasty.
Here was mine (Lyre Tail - Cyprinocirrhites polyactis) and the cage that I built specifically for him (which is useful for an acclimation box now).

Within one week this guy claimed 2 lives and nearly 3. This was even after searching and seeing they were ‘compatible’ with the species I had. The first death was my 4 year old CBB, then it was my 4 year old male Iridis Wrasse, then he went for my Diamond Tail Flasher and that was when I built the cage.

 

[steveschuerger]

The list -
Splendid Dottyback (well probably any but I had one of these terrors)
Yellowtail Damsels that turned out to be jerks and developed a taste for Acros
Bristletooth tang who was the the most bossy in your face fish , especially with my Blenny
Honorable mentions to-
My pearly Jawfish who has several times buried corals worth over 5 times his cost. Fortunately no casualties as the sand was easy to blow off.
My freakin Ocellaris clowns, who have murdered at least 5 corals while trying to use them as hosts(3 frogspawn and 2 gonis if I’m counting correctly). The worst of it is that they utilize the bta , esp to sleep in. Ugh.

 

[Alcro80]

Emerald crab. Got big and ate two small wrasses

 

[Schulks]

Flame Angel. Bullies anything red or close to red in colour.

I just got a flameangel and I am happy to report I have no other red fish.

 

[Autistic reef keeper]

This is very true!Hewbie would absolutely love to eat him.

That is a very nice puffer fish what’s the minimum tank size?

 

[Autistic reef keeper]

Puffers are the best! They just need their own fowlr tanks if you tried to put one in a reef that was your problem because they aren’t and have never been reef-safe.

What’s the worst second happen with SPS colonies that been the time for three years they can probably take a few nips

 

[Ziggy17]

Emerald crab. Got big and ate two small wrasses

So gross watching a $5 crab eat a $100 fish.

 

[bun]

if your rockwork is not secured and not bonded together, they will burrow under and cause it to collapse.
Also they will barf sand all over your corals on the sand bed.

And they get into neighbor disputes with jawfishes like this:

Don't get a blue spotted jaw fish.

 

[Autistic reef keeper]

My freakin Ocellaris clowns, who have murdered at least 5 corals while trying to use them as hosts(3 frogspawn and 2 gonis if I’m counting correctly). The worst of it is that they utilize the bta , esp to sleep in. Ugh.

See clown fish aren’t completely coral safe lol.