aggression

Hello everyone, earlier today I noticed these marks on my clownfish. Im still fairly inexperienced in the hobby and google said these might be bite marks so I wanted to see if anyone might have any advice. He shares a 40 gallon tank with three sailfin mollys and a pajama cardinal. One molly is...

So I got two black pyramid butterfly for Christmas, I wanted them for my reef tank, long story short tho. I did not quarantine and just put them in my display and they were covered in flukes like a week later so I took them out and I did a freshwater bath for 5 mins, so many flukes came off…...

Contemplating adding a new fish to the mix and would like feedback. Want to add a 3-4” gem tang to the group. Currently I have a 3” clown, 2” orange shoulder, and 2.5” Kole eye tangs. Tank is 112gal 5’ wide tank. Plan on upgrading to a 250gal in a few years. Thoughts?

I recently bought a pair of banggai cardinals. They were and still are really small and couldn't be sexed. They've been in my tank for over 10 days now. One is very active and is eating well and swimming throughout the tank. The other hangs out in the top corner or at the back of the rock...

I recently added a Midas Blenny to my 35g aquarium, with a pair of clown fish. The last Blenny that I had was super peaceful and shy, but this one has been periodically nipping at the clownfish fins and one clownfish has some damage to his back fins now. Anything I can do to help with the...

Hi Everyone, I have a 32 gallon tank (about 3 feet long) and currently have 5 fish: 2x Blackstorm clownfish 1x Yasha goby w/pistol shrimp (the pistol is maybe 1/2 an inch lol) 1x Helfrichi firefish 1x Citrinis Clown goby 1x Cleaner Shrimp The tank doesn't have many active swimmers which is...

my tang population of 5 was reduced to 1 while on vacation a year ago. The tank was cared for by somebody experienced while I was gone, so it wasn’t neglect. I still don’t know how or why 4 suddenly died all together. The lone survivor was my purple tang, which immediately took the dominant role...

Noticed my damsel wasn’t swimming around. Found it like this (see picture). Still swims, sometimes upside down. Very lethargic/easy to catch. It is in a “newbie mistake” overcrowded tank, but it’s generally peaceful. I’ve qt’d the damsel and have dosed my tank with Reef Rally Pro. I’m...

I have a 20g with a talbot damsel who I think is maturing and turning out to be an butt (yes I know who woulda thunk). It’s starting to kind of target my bar goby when it’s swimming near his rocks. I was wondering if there’s a fish I could add to disperse the aggression perhaps like a royal...

Clownfish pairing.. We got our first clownfish a few days ago 1.5”, she’s in a QT. We got the second 1” looks very tiny, we hope to pair tonight. I know the nipping is part of dominance. But I’m afraid of leaving the little one overnight and waking up to a dead fish. I’m thinking I’ll add a...

I am well aware wrasse of the genus Thalassoma specifically Lunare, Hardicke and Paddlefin are extremely aggressive and will destroy a cleanup crew. I know they can also bully small fish but is it true wrasse of this genus will actually prey on small fish as well? Would damsels, anthias...

A few weeks ago i bought a coral beauty for my 40g tank. 2 days ago I bought a fire fish. I was planning on getting 2-3 because I know they are better in groups, however the fish store only had one. I put the fire fish in that night, and the next morning i couldn’t find him. I assumed he was...

Hello! I have 2 tangs, a purple and yellow. They have a habit of ganging up on certain newcomers (killed a powder blue tang and a coral beauty angel on seperate occasions). Right now I have a copperband in the tank with a partition up so the tangs can't get her. To avoid aggression I thought it...

I added a yellow watchman goby to our tank last week and my tailspot blenny immediately started attacking. I put the ywg in an acclimation box for six days and let him out yesterday. The attacking is slightly less persistent but still occurring regularly. I have to sit next to the tank and waive...

I have a trigger I’ve had in a QT tank waiting to cycle meds but I wanted to add a couple more fish to it before starting the cycle. I added a decently large diamond Goby yesterday and walked down this morning to it dead and being picked at by the trigger. Anyone had this trigger kill other...

Due to some aggression in my tank I am in need of rehoming a Scopas Tang. Huge bummer as it's a beautiful fish. I currently have the scopas in the empty refugium section of my sump where it can also enter into the skimmer section (skimmer is off) and uses the skimmer to hide behind. The tang is...

I've heard probably most people say they had huge aggression issues with six lines, and a few claim they were model citizens. I would love to have one, but I'm wondering what circumstances you've had that resulted in aggression or peacefulness? Specifically tank size, other inhabitants, and also...

270gal tank - So we have a resident Moorish Idol of about 2 months I think. We attempted to school by adding two more. The original is relentlessly attacking the two new Moorish Idols who are larger. We’ve moved the bully to the 93g tank and the purple tang is now attacking the Moorish. Is it...

Hello, I have a 300 gallon FOWLR. It has baby horn shark (it’ll be moved to a 500 gallon in a year or 2), a 5 inch miniatus grouper, a Niger trigger, a powder brown tang, a blue ribbon eel, a clown that came with the tank who holds his own well, and a 4 inch hi fin snapper. Everyone’s been...

Help! My daughter purchased a Lawnmower Blenny for my birthday to replace my previous one that went missing and never reappeared. Since being introduced, he’s been very territorial towards my existing goby. Will this behavior continue or can it be reasonably expected to go away? My display is 75...

Hey guys. Wondering if this is possibly Brook or some scale damage. To me, it just looks like the scales are lifted a bit BUT lfs said clownish dont have scales. I went to another lfs right after (first one didn’t have what I came there for) and figured I would ask there. They told me that...

Hi! I have a 40g community tank with lps and soft coral. I have about 45 lbs of live rock. I have: 1 pajama cardinal, 2 clownfish, 1 diamond goby, 1 purple fire fish, and 1 citron goby (the bully). For inverts I have about 10 hermits and 15 snails, a skunk cleaner, a fire shrimp, 2 peppermint...

Why does the chromis keep hanging around my clownfish like this? The clown obviously doesn't want him there and charges at him, but I've also seen the chromis bite back, no matter where the clown goes the chromis continues to hover around him. Is there some way to stop this? Let it run its...

Hi there, I have a question about the aggression of the Blue Devil Damsel. I transferred this fish into a new red sea reefer 350 & sadly didn't research its aggression towards new fish. I've had this guy for over a year in a nano tank with a clown. It was bullying a new firefish for the first...

Recently added a coral beauty to my 120 tank. It started fussing with my clownfish now both have faint white blemishes. It is a little tough to see because a diamond goby is busy stirring up the sandbed