Miscellaneous Marine Fish

What type of fish can I keep with my adult male betta fish, he is in a 3 gallon tank.

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 have two male fish that I'm not sure of the breed there names are Ben(Benny) and Rosco can u please help

Can I put another type of fish with my male betta?

There’s something in my fish tank, but I have no idea what it is and I need help identifying it. Thank you!

My fish has bulges on both sides. They have been there for months. The fish spent months fighting the other glofish in the aquarium. The water is tested, changed about every 3-4 weeks. Water change is 50%. I also change the filter 3-4 weeks. I feed flakes, dried blood worms, and frozen assortment of food.

I used to have 7 Fish 2 gold comet Fish 2 Comet silver Fish and 3 Shubunkins one Gold Comet Fish died and the gold comet Fish that didn't die is now pecking at my other Fish and it looks soooooooooooo annoying please help xoxoxoxxoxoxoxoxox love Foxi

One of my fish has open sore on both sides of the skin. Apparently some of the other fish has bitten him and now some of his skin is bulging on both sides and it’s in a 70 gallon tank with other fish, and I don’t know what to do.. can someone help me..

Two of our freshwater fish are acting oddly in the water. We did lose a few last night, due to an ammonia spike. We noticed some pale-colored, wormlike flesh dropping from the front area (between the mouth and front fins); this black Guppy is “wobbling” around... We also have an orange Molly fish that has been staying on the bottom, not eating or moving much. Attached are pics, for your review. Can you please provide advice for these issues, we want to try our best to save them!

I have 2 salmenese tiger fish and two smaller fish in approximately 3.5 L bowl. I bought them on 1 April. 3 act normal but one act abnormal from first day. One salmenese tiger fish doesn't move much first it stayed at bottom now it's gapping at surface and if I try to catch to check it it goes down again. It's fins are turning red or I don't know if it already was. I don't understand how to help. Parents are out town so I can't go to shop. I am not sure if all are eating food.

Im wondering if im able to put any other types of fish into the same tank as my Bass, but ones he wont eat.

I dont know if you are a tropical fish specialist. But there is something going on in my tank and need help diagnosing it. My corydora has two raised growths ..one at the base of its fin. And one under the eye. My pleco seems a bit tattered too. A little flashing was happening with my yoyo loach also. That's now stopped after a water change.