Large Marine Angelfish

I have an angelfish and a red tail shark in a 15 gallon tank for about 4 days and they get along great. The angel fish has been almost swimming kind of lazy like almost floating and then will swim when off balance. And belly kinda looks swollen as well as eyes. And my red tail shark seems to have a gray patch on it's side and not swimming as active as he was. Either hides in the back of tank or in a house for hours.

What type of saltwater fish can I have in a 10 gallon tank

I have just brought a new rapheal spooted catfish what care should I take as it is with discuss arrowana and blue angel pls will u share me the link how to hold it

Which category male flower fish add with couple of yellow blood parrot fish(male and female both are) in a (42L×7w×18h)inch water tank ? Can u guide to me this successful breeding process ? In a currently I have only two yellow parrot fish.

I am having a high back arrowana with peacock bass and I m finding many wounds on arrowana and I dont have the facility to separate them pls help what to do as I hope its peacock bass which must be attacking pls help

I recently bought a pearl arrowana fish what care should I take

Is it suitable to make a 1 feet marine tank. What fish should i keep in it?

why is my yellow parrot fish fight by mouth and rounding each together ?

Can I add two very small silver arowanas to a huge tank (7foot or more). And also 2 oscars Also can u plz tell me everything about arowanas

Does a orange belly in a fish mean she is pregnant and there is two male goldfish with her

My pair of parrot chichlid are doing unusual thing they are holding each others mouth just like kissing each other after some time my pair of angel fish also started doing the same what's going on (they are just doing like lip lock) what's going on and also they are trying to hold each others back body at the same time..?????????

How many oscar fish can raise to adult hood in a 55 gallon tank