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Welcome to Petco’s saltwater fish store. Pet fish can make wonderful additions to your home and family. At Petco, saltwater marine fish for sale can be delivered to your home or purchased from our in-store Pet Care Center Aquatic Departments.
There you can find many kinds of Petco fish. Our pet fish types include beautiful Blue Hepatus Tang, Dog Face Puffers, Black Volitan Lionfish, Majestic Angel Fish and many other species. When you’re ready to order or pick up one of our saltwater aquarium fish for sale, you’ll want to be prepared with the appropriate home to welcome your pet fish.
Get set up with the appropriate aquariums, kits and stands, as well as fish feeding accessories. You’ll also want to make sure you have suitable aquarium water care supplies for aquarium maintenance.
You can discover many saltwater fish for sale in our fish pet store that can be great for either beginner aquarists or long-time fish pet parents. To make sure you’re adding an appropriate mix of fish into your community, check out our saltwater aquatic life compatibility chart.
Discover freshwater fish for sale at Petco for the right pet fish for your freshwater aquarium—including Petco betta fish.
Learn how to care for large marine fish, recommended diet and habitat setup. Find the right food, supplies and equipment at your neighborhood Petco.
Updated on November 12th, 2025
Learn how to care for Boxfish & Cowfish, recommended diet and aquarium setup. Find the right food, supplies and equipment at your neighborhood Petco.
Updated on November 12th, 2025
Learn how to take care of triggerfish, recommended diet and tank setup. Find the right food, supplies and equipment at your neighborhood Petco.
Updated on November 12th, 2025
Learn how to care for a Marine eel, recommended diet & aquarium setup. Find the right food, supplies & equipment at your neighborhood Petco.
Updated on November 12th, 2025
Learn how to care for hard coral, recommended diet and aquarium setup. Find the right food, supplies and equipment at your neighborhood Petco.
Updated on November 12th, 2025
Yes it is possible, however, unless you have a lot of experience keeping saltwater fish, please do not even attempt it. Most wild caught saltwater fish will not feed when they are in an aquarium, and only a small percentage will ever learn to feed. Please leave them where they are happy and healthy and where they belong, the sea.
Updated on August 12th, 2025
Check water chemistry first. Use a home test kit or submit a water sample for testing. The local Petco may do this for free or for a small fee. Aim for an absence ( 0 ppm) of ammonia and nitrites with nitrates at 20 ppm or less. Perform partial water changes, no more than 30% at a time, to stabilize chemistry and/or to improve water quality. Use only conditioned water that is temperature matched to prevent stress or shock. Check water temp as well. Any of these can drive a fish to the surface. The "flashing" (darting about) can be due to infection (bacterial, fungal or parasites). Consider a broad spectrum antibiotic or an "all in one" product to treat multiple infections. Look in the Aquarium section of the local Petco for options. Follow label directions carefully and remove the carbon filter insert during treatment if indicated.
Updated on August 12th, 2025
Thank you for using Boop by Petco! Ariel does look like she has a little bit of white on her abdomen, and potentially some raised scales. She also appears to be swimming towards the bottom of the tank, but this may just be a coincidence in the photo. The white on the abdomen can be caused by a fungal or parasitic infection, so I recommend separating this fish from the others. You may want to change the water and sanitize the tank if any other fish start to get similar symptoms. I hope this helps and am happy to answer any other questions you may have!
Updated on August 12th, 2025
Thanks for reaching out, the rule of thumb is 1" of fish per 3 gallons, but smaller tanks are very difficult to keep stable, and saltwater fish are easily stressed by environmental fluctuations (salinity, temperature, dissolved oxygen). Good luck.
Updated on August 12th, 2025
Without anything to use for scale, it is hard for me to tell how big your tank is, but in general it seems very small. Also, the water that is in the tank appears very cloudy right now, so that would be the first place to start. Water quality is very important, and will make or break your ability to house and care for fish. I would recommend getting a good filter system (you can visit a local pet store to assist you with brands in your area, as I am not familiar with what you can get in India). Be sure to bring the measurements (height, length, width) of your tank, or the gallons or liters so they can tell you what capacity of filter you will need. Everything else will depend on what types of fish you get - if you plan on getting multiple fish, they will need to be small - a general rule of thumb is one square inch of fish per gallon of water. Depending on the species you get, you may need to also get a bubbler to ensure there is enough oxygen in the water for them, and you will also
Updated on August 12th, 2025