Aquarium Serial killers!

[jkobel]

Long Tentacle Plate Coral.

disc was about 3" across so when fully inflated it was rather large in my 75gal.

I called it "The Sarlac" because it would pull in anything and everything. On more than one occasion i came downstairs in the morning and it would have a fish, face first into the oral orifice

 

[Turf]

I don't have actual proof but I think a tiger pistol shrimp went rogue and was picking my fish off one by one in the night.

My wife saw our pistol shrimp pull an emerald crab into his burrow. We enjoyed watching the crab for the 3 days we had him........ before he was murdered.

 

[Coogles]

Had a Picasso trigger that was fine until he grew to about 2 1/2 inches, then he started murdering every crab, shrimp and snail I had in the tank.

 

[jkobel]

the beginner "me" was the worst killer my tank ever saw. happily, I am much less lethal these days

oh good call, same here lol

 

[Mschmidt]

More likely a snack for later..

planning ahead. smart.

 

[LPS Bum]

Years ago I had a Lunare Wrasse that ripped out the eyes of a poor Yellow Tang and then killed it. I took every rock out of that 240 gallon tank in order to catch him and give him away. And in my reef I had a rogue Peppermint Shrimp that tore apart an expensive Trachy brain coral right in front of me. Needless to say, I trapped that murderer and gave him away too.

Currently, I have the world's meanest Tomato Clown in my FOWLR. She'd like to murder me if she could (tries to every time I put my hands in the aquarium). God help her if I ever catch her in a net.

 

[adromero]

I decided to put a chalk bass in my seahorse tank which I had running for five years. All three seahorses had their eyes damaged and died shortly after. I didn't think it was the bass. I thought it was a seahorse disease that I looked up online, but when I put the bass in my 70 gallon a flame cardinal suffered the same. That flame cardinal hung out in a cave and was driven out by the bass and had the same eye injury. The cardinal died.

The chalk bass disappeared a few weeks later. I think it tried to do the same to the sixline and/or tomato clown.

 

[Greego]

I noticed that some small fish were disappearing in my tank and couldn’t figure out why until I was doing a water change and witness my banded coral shrimp snatch him up mid breaststroke, haul him off behind a rock then started munching on him right before my eyes.

 

[mchans]

None of my fish liked my small school of Green Chromis. Then one day out of the blue my Niger Trigger just started hunting them down. It would kill one and not eat it. Just kill it and move on to the next one. Took out five and then stopped. Hasn’t had a problem with any other fish in the past year.

 

[clockman]

I don't have actual proof but I think a tiger pistol shrimp went rogue and was picking my fish off one by one in the night.

Yes, I had to trade mine in to the LFS as it went rogue and killed/ate its companion YWG

 

[clockman]

I don't have actual proof but I think a tiger pistol shrimp went rogue and was picking my fish off one by one in the night.

Yes, mine killed and started eating its companion YWG so I traded him in at my LFS

 

[HBtank]

That time I thought I would add some buddies for my fully grown blue reef chromis, and create a "school"..... yeah, those three fish lasted about an hour.

That fish ended up being very aggressive, period, and got sent to the LFS.

 

[David Groos]

I had a large colony of ‘utter chaos’ Zia’s that started disappearing one at a time. All the rest were fully open as were the rest of the Zia’s in the tank. One day a caught my emerald crab red handed picking a polyp and eating it. He now lives in the sump

 

[Labridaedicted]

Actually just pulled a big emerald out last night that I was watching actively scrape and eat the tissue off of one of my acros. He now resides in the fuge.

 

[rcillig]

I had a flame hawkfish who killed or terroized my community tank. But he some how found himself on the wrong side of a carpet anemone.

 

[uhgster1]

I had a falco hawk fish that was the coolest thing ever, unless you put anything else in the tank with him. It was ruthless.

 

[fisheriesdoc]

Sargassum fish. Incredibly boring except for the cumulative 45 seconds that it consumed all its tank mates. Never again

 

[KristineV]

This guy (earmuff wrasse) is a serial killer of hermits, emerald crabs, most snails, cleaner shrimp and even a poor anemone crab.

And she (Kuiter's leopard) is his accomplice!

They are beautiful!

 

[binaryfuneral]

Had a pair of clowns that killed a juvenile French angelfish by tiring it out and dragging it into their anemone. They earned the names Bonnie and Cylde and were banished back to the LFS. I’m sure another reefer is writing about them right now.

 

[design.maddie]

I had a Splendid Dottyback for crazy. It first started gathering all the snails and killing them and stacking them in an area. Then it went at all the hermits, did the same with them. It then went at my trio of emerald crabs. After it was done it started going after the other fish in the tank. Nothing had changed in the system that I could see causing such a drastic change. It just became super territorial over night. I moved her to my sump and she passed away within 2 weeks without much difference than sporadic swimming at times.