behavior

Just noticed today my hippo tang that I’ve had for over a year and was quarantined just like all my other fish, has been acting erratic and twitching for a few seconds after acting erratic and then it returns to normal for a little while than back to erratic and twitching, then back to normal...

Hi, Clown fish in third day of hiding. I've had a valentini puffer in my 30 gallon tank for about two weeks. I ran out of food for two days and my mandarin goby went missing. The first day I had the puffer, it devoured my emerald crabs. Now my typically belligerent clown fish (had for about a...

Is this normal? I have a midas blenny that I had for about two months now. He’s doing fine, eating like normal, swimming like normal, but he will hide the second he sees someone near the tank. If you look away he will come out, but the second you look at him he will hide in a rock with his head...

Bought a pair of clown fish one male one female and they’ve just been pacing throughout the tank they have no threats and the tank conditions are good anyone know why they do this?

I recently introduced a new clownfish to my tank. My old clown is a little bigger (but not by much) so I am assuming it is a female. It’s been in my tank alone for about 3 weeks after killing my 6-line wrasse. I gave her a new clown today (same kind of clown) and now she is pecking at it. Is...

I recently caught our wrasse looking for opportunities to lie down in our nano tank like this. Lately, he’s been swimming a lot with his head up, tail down. I’m actively monitoring the situation, but looking to identify if this is normal behavior?

This is my first saltwater tank so I'm still learning clownfish behavior, I have two perc clowns (about 1.25 -1.5in) LaFawnda (bigger one) and Kip (smaller) LaFawnda likes to hangout at the front left top of my tank for 80-90% and the other 10% she rides the current from the wave maker or will...

I recently introduced a Naoko's Fairy Wrasse into my tank a few days ago. He has been pretty timid, hiding within the rock. I was able to get him to eat yesterday. Today he came right out once I turned the flow off and I saw it as an opportunity to feed him. He readily accepted it. This evening...

Hi! This is my first post on the forum so please let me know if I’m doing something incorrectly. I bought this Exquisite Wrasse 4 weeks ago and he displayed no abnormal behavior until around a week and a half ago. He started to swim around at the top of the tank and now he rarely goes down into...

Is this nesting behavior? She’s never shown a bit of interest in the sinularia in over 2 years. Now she’s hosting it like it’s an anemone and has a particular interest in the little hole in the middle of the zoathids. She’s even pecking at some of them. She’s also a giant ****** when you put...

Please note: I would like to hear what your hippo tang in specific has done and would like to avoid what any other tangs have done in your tank, thank you for your participation. Hello all, I'm currently an undergrad student trying to conduct independent research on tang aggression. More...

Hi!! I’ve had my damsel since June 2022 and overnight it has adapted a digging behavior in its preferred corner of the tank. Curious if anyone has any insight to this behavior and if it is a nesting behavior or trait related to males or females! here is a video of my damsel! Furthermore, my...

My YWG did wonderful in QT and did what you'd expect from a watchman. But after moving to my main tank, two months ago he doesn't stay on the sandbed and will sometimes swim around the tank like crazy. I have really sensitive inverts thriving so is there something to be concerned about? See...

I recently purchased a Long Nose Hawk, A Clownfish and a Cleaner Wrasse. For the most part, everything has gone well except that I have noticed that the cleaner seems to target the Long Nose Hawk disproportionately compared to the other fish for his cleaning service. The Long Nose hawk appears...

About 3 days ago I added a diamond goby to my tank. I don’t have much experience with them myself but from what I can gather it seems like it’s not unusual to not see them for a while after they are added to a tank. My question is at what point should I be concerned? I think I know what rock...

Hey all! I recently acquired 2 banggai cardinalfish which I believe to be a male and female. I’ve only had them home for a few days, but I’ve noticed every once and a while they will do this behavior. One will pause, fold it’s fins over and turn slightly, and then yawn. Occasionally the other...

I purchased 2 strawberry conch. For a week after purchase they were SUPER active and exploratory. One still is 2 weeks later but for the last 3 days the other one hasn't moved. Is it stuck? When you see the picture you'll understand why I'm concerned about it being stuck.

Hi everyone! My hippo tang has been acting strange recently. I’ve had her for close to two years, and I purchased her as a young fish. I have a 75 gallon tank, with pretty mellow fish like clowns and gobies. About two weeks ago, I rearranged the tank and added some arches and a wave maker. I...

Hi Everybody! I'm rather new to the hobby and have slowly been stocking my reef tank (65 gal) with fish. I had 2 clowns, 2 darts and 1 watchman goby. I decided to add a Lyretail Anthias, based on my understanding that they are peaceful. Unfortunately, she likes to chase the darts. Mostly when I...

Hello All, so I have had three female Ignitus Anthias in my 120 gallon aquarium for 7 months now. All has been well up until about a month ago. One of my anthias parked up in a corner towards the top of the tank, and the other two seemed to almost be protecting it. It is not showing any signs of...

Hi so I’m new to the whole saltwater aquarium hobby and I’ve been enjorying it so far. Currently I’m trying to cycle my tank and I have dry rock with salt water and two small clownfish in a 30 gal. Here are the parameters: Salinity 1.023, Ammonia .7 ppm, Nitrite .25 ppm, Nitrate 10 ppm, Ph 7.9...

The bumblebee shrimp is below the turbo snail I finally picked up 3 bumblebee shrimps and two of them (not sure what happened to the third) seem obsessed with the snails in my tank. Is this normal. I know there's a symbiotic relationship with Emperor Shrimps and nudibranches and various other...

So I got a Kole tang about a week ago. Plump, eating well, zipping around the qt and seems very healthy. He does this weird thing though. Once in awhile, he’ll do this little scoot backwards once or twice, then go back to zipping around. It seems like he only does this when he knows I’m looking...

I have an established fish only tank. I have a relatively large Naso tang I’ve had for years and a Tomini tang that I’ve had for about 2 years. They get along just fine. Suddenly, they’re both huddled in the back of the tank, the Naso tang is vertical, and the tomini tang is facing the opposite...

When I get home from work at night my clownfish goes nuts. I usually feed during the day and he gets fed plenty. He seems like he is all over the place and bumping into the glass but he may just be precisely swimming to each side. This seems a little erratic. Thoughts?