aggression

Hi all! Happy Weekend! currently I have a Purple Tang and a Foxface. They get on completely fine but like brothers sometimes do want there own space. I was thinking about adding another yellow tang. would a third calm aggression or would it spike some more trouble? currently a 200 litre tank...

Hello everyone. I was wondering if anyone had any experience with Tangs being aggressive towards eels? I purchased a 16' Zebra eel two weeks ago for my 80g (48x24x17) and ever since the first day in the tank my tang is constantly beefing with him. He will swim into the cave the Eel likes to hang...

hello everyone, I am researching clown gobies and would love to put a small group or pair in my 20g long, but I have heard conflicting information on putting multiple in, my preference would be multiple or a pair of yellow clown gobies but if I need to get different species I will. Just looking...

I have 2 clownfish and a marble/checkerboard/hortulanus wrasse in my 125g. Wrasse attacks clowns when food is dropped yet, wrasse won't eat it. Clowns are confined to the top of the water or the corners. The wrasse always watches them. The clownfish don't fight back. I feel as though I should...

Hey all, I'm not sure if my fish are having aggression issues or if this is normal behaviour. Any advice is appreciated! I recently downsized from a 24g to a Fluval 13.5. In it I have plenty of live rock with many crevices, tunnels, and hideyholes, my corals (mostly small except for a "large"...

1 - my rock work is a series of caves and pass through, getting a problem fish out will be difficult even with a trap. 2 - Currently have 1 blood orange clown, one ocellaris (took about 10-12 days but they are best friends already thankfully) & a Midas Blenny. 3 - 75g, 4’ long with a 40g breeder...

Hey everyone, I have decided to get my clownfish (male) a new mate since the female died in qt. The male clown is very adventurous. The tank is around 50 gallons around 3 feet long. They are 4-5 cm .The new clown is almost the same size and when i plopped him in he old clown went straight for...

Hi everyone, I am a tank caretaker at our college and we have this interesting case I wanted to share in case anyone recognizes it. This female clown is in a 30gal SW tank with a purple dottyback. Other inhabitants are really large toadstool, CUC (urchin, green emerald crabs, hermits, snails...

So I’ve had 2 clownfish in my tank and every fish I’ve tried to put in there they have died and I’m pretty sure they killed them maybe just the black one she’s kinda aggressive. I know they can be territorial if I put them in a breeder net for a bit and add another fish to the tank would that...

I am new to the hobby and I’m pretty set on getting a pair of the devil fish, AKA Maroon Clowns. Is there anything that yall have seen that will thrive with a pair of maroon clowns in the tank? If not, I am perfectly happy having just the pair in the tank. Thanks in advance!

I had a lone ocellaris clown fish in my tank for about a year before getting a second clown to pair with it. The new clown I got was significantly smaller, about 1/3 the size of my existing clown. They seemed to pair up almost immediately with only some minimal aggression in the first day or...

I have these two clownfish who have been in the same tank for about a month and at first their pairing habits weren’t worrisome but now it’s getting a little worrying. My WW clown runs the tank while my vivid stays hidden in a crevasse under a rock until the lights turn out and comes out to...

I have a 30-gallon nano tank with a 3-4 inch deep sand bed and 30-40 pounds of live rock. I have a 2-inch orchid dottyback, a banggai cardinalfish that’s nearly adult sized, and a pair of ocellaris clownfish, both of which together are probably about 1.5-2 inches. The tank’s been running for...

So I have a pair of divinchi clownfish that I have owned for about 9 months and they have been great, they are the first fish in my first tank so getting rid of them isn't really an option. I know clownfish can be aggressive and that is why I haven't added any more fish to the tank, but...

My two clownfish are fight and I don’t know why. I got them as a pair

I asked my LFS for a fun and peaceful addition to my tank. The guy immediately told me about this Canary Blenny that he had. As soon as I introduce him to my tank he starts to bite all of my snails! I’ve looked everywhere and I can only find posts about lawnmower blennys doing this. Is there...

Hi, I recently got into the hobby with a modest 33g reef tank. Everything has been running smoothly for the past few weeks, and every tank inhabitant seems to be doing well. In my tank dwell 2 clownfish (a Black ice and a Darwin) as well as the good old cleaner shrimp and a few other cleaning...

So apparently I have a unique situation in which I added a PBT to my DT after I added my fox face Lo 4 weeks prior. I thought I had the order of adding them correct based on aggression BUT as many things in this hobby will do, I was surprised to see my fox face Lo was far more aggressive to my...

I have had a watchman goby and a six line wrasse living together in a 32 gallon aquarium for two months. I just saw the wrasse attacking the goby. The wrasse isn’t bugging my other fish. Do I need to rehome the wrasse, or is there something else I could try? Water parameters are stable, only...

Hey all, wanted to see what advice and experiences y'all have had with fish being aggressive in smaller tanks, and how to deal with it. I recently added a pair of firefish to my frag reef and their behavior has changed drastically from the fish store, to QT, to now. I was under the assumption...

I have a 75 gallon with 6 fish; 2 clowns, foxface,blenny, cardinal (which is going bye bye), Royal gramma, and a 6 line. Would like to add a yellow tang, melenarus wrasse, cleaner shrimp, and maybe a black cap basslet. My tank is established and the new fish would be coming from the same system...

Tonight I ran into, without question, one of the strangest things I ever have in all my days keeping fish. I recently finished adding my fish back to the DT after a long fallow period for ich. They’ve been back about two weeks, and tonight I cut the lights off a little early to acclimate a new...

I added a couple new wrasses to a tank with two established leopard wrasses. One of the two new wrasses is also a leopard wrasse. It is intimidated by the other fish and stays buried all day except a couple days where it emerged for less than five minutes. I managed to catch the interaction on...

I have a 32G Biocube with 2 zebra Dartfish, a sharknose goby, and a yellow assessor. I purchased the sharknose because he was said to not be aggressive and I thought his cleaner tendencies would not be a negative aspect. Well, he is a bully! He attacks all the fish and us every time we put our...

I have a tank with two resident female leopard wrasses. I recently added an ornate leopard wrasse (a different species than the ones I have) and a yellow coris wrasse to my tank at the same time. The yellow wrasse adjusted well and the established wrasses accepted it without a second thought...