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Sharing some important fish names in groups you can find and keep them together in a same tank, making it easy for you guys to select your fish wisely from your LFS. And if taken proper care and giving them good environment as they need, your fish mortality rate will definitely lower down


MIXED TROPICAL - White Clouds,Fancy Guppies, Corydoras Catfish, Glass Fish, Neon Tetras, Glowlight Tetras, Harlequin Rasboras, Honey Gouramis,and Ghost Shrimp. These fish are compatible and a few of them will do well in a 15-gallon aquarium with warm water. These fish are not compatible with most other species of fish. Can be kept with Discus if both are grown together.

SCHOOLING LOVERS - Danios, Swordtails, Mollies, and Platies, plus Bigger Tetras such as Black Skirt Tetras, Painted Tetras, Serpae Tetras, Red Eye Tetras, Black Neon Tetras, and Silver Tip Tetras. A few of these fish will do well in a 15-gallon aquarium with warm water. Each fish species in this group lives best in a group of 6-8 member of that species. More school means more activity.

ANGELS - Freshwater Angels, plus Dwarf Gouramis and Neon Blue Gouramis, plus Neon Blue Rainbows make a nice compatible group of fish. These fish require a warm water aquarium. Eventually they’ll need an aquarium with at least 29 gallons of water, and an aquarium at least 18 inches tall is recommended for Angels. A Plecostomus Catfish is also compatible with these fish.

THE MILD AGGRESSIVE - Barbs, Gouramis, Sharks, Eels, and Loaches. Tiger Barbs and Tinfoil Barbs, plus Blue, Gold, and Opaline Gouramis, plus Bala Sharks, Red Tail Sharks, Rainbow Sharks, and White Tip Sharks.These fish are mildly aggressive and compatible with each other. They will grow fast and need at least a 35-40gallon aquarium with warm water. They will need a much bigger aquarium when they are full size.

SEMI-AGGRESSIVE - Firemouth, Convict, Pink Convict, Texas Cichlid, Jack Dempsey and other New World Cichlids are very aggressive fish. But many aquarists enjoy watching them dig, defend their territories, and care for baby fish. Large Plecostomus Catfish, Synodontis Catfish, and White Tip Sharks are usually compatible with New World Cichlids. Within a year or so a group of these fish will need an aquarium with at least 50 gallons of warm water. Eventually these fish will need an even bigger aquarium.

AGGRESSIVE - Mbuna Cichlids. Auratus, Kenyi, Red Zebra, Pindani, Johanni, etc. Mbunas are from Lake Malawi in East Africa where they live among the piles of large rocks along the shore. Mbunas are aggressive and need to be kept in a group with at least 12 other Mbunas. If kept in a smaller group, the strongest fish will make life miserable for the weaker fish. A group of 12 adult Mbunas will need a warm water aquarium with at least 50 gallons. Synodontis Catfish are compatible with Mbuna Cichlids. Eventually a group of Mbunas will need an aquarium with at least 80 gallons of water. Click here to read a story about an 80-gallon aquarium with Mbunas. Click here for more about warm water aquariums.

OSCARS - Oscars and Large Fish. Red Oscars, Black Oscars, Tiger Oscars, and Pink Oscars will grow fast to very large sizes. Oscars are compatible with Bigger Pacus, White Tip Sharks and Medium and Large Plecostomus. These fish will grow fast and soon need a 50-gallon aquarium with warm water. Eventually these fish will need an even bigger aquarium.

PEOCOCK AND HAPS - Malawi Peacocks, Electric Blue Haps, Yellow Peacocks, Jacobfreibergi and other fish that live away from the piles of rocks in Lake Malawi, where the more aggressive Mbuna Cichlids live. Keep a group of at least 12 of fish so the strongest fish not make the weakest fish miserable. These fish will grow fast and need a warm water aquarium with at least 50 gallons. Eventually they will need an aquarium with at least 80 gallons of water. Synodontis Catfish are usually compatible with Peacocks and Haps., but the Mbuna Cichlids, listed above, are not.

INVERTBRATES - Critters. Tadpoles, Fiddler Crabs, Mystery Snails, Crayfish and Ghost Shrimp. These animals do well in either a cool water aquarium or a warm water aquarium. These critters are compatible with many smaller less aggressive fish, except the Crayfish, which are larger, more aggressive, and may bother small fish, but Crayfish are usually compatible with aggressive fish. Puffer Fish love to eat Crabs, Shrimps, and Crayfish, so they are not compatible with these Critters.

So... what do you think? Please leave me a comment or give me a


  • johnarthur: It’s also important to note that many cichlid species become large and aggressive as they mature. Before adding a fish to an aquarium, always consider adult size and behaviors.
  • Rachael: I’ve had a school of tiger barbs (6) & one white tip shark for almost one year. Now shark is going after the tiger barbs. They are scattering not defending themselves as usual (typical for tiger barbs). Should I get more tiger barns or move shark out of the tank? It’s a 30 gallon. Pls help!:-( thank you!
  • Natasha: Good blog :)
    I was looking into getting some rainbow sharks but already have tiger barbs..they are only young so is there still a chance that they will get along?
  • Christian: Will my mbunas (auratus , blue ahli, yellow lab) do well with attexas cichlid? I dont have any idea on their compatibilities.
  • JWT54: How are new world cichlids semi-aggressive? and my oscar compared to my other new world cichlids is on the nicer side
  • johnarthur: Many cichlids become aggressive before spawning, and they remain aggressive while protecting their eggs and fry.
  • TKJM: i just got neon tetras in my take. every night one goes missing. its only after the lights go out however. when i look at the fish in the morning the tiger barb has a big belly, however he’s much to small to eat a fish. i was wondering if it could be my firetiger catfish. is anyone else having this problem?
  • laraine hewitt: very interesting had fish tanks most my life
    still alot to be learnt even at 71 yrs old.
  • laraine hewitt: new tank how many fish would you put in first 65litre tank to start off with.
  • laraine hewitt: I like this site very much so much info about fish,your tank,heaters filters all you want to know about your fish tank.
  • Sue: Hi,
    I have just lost my 2 black tipped sharks. All my other fish seem to be doing fine. I have had the tank set up for over 2 years. I change the water once a month. What am I doing wrong? Please help.
  • laraine hewitt: hi sue
    not quite sure have you done water changes, have you put aqua safe to clean out all the rubbish thats in tap water,also have you put in bateria gel on your filter sponges. last of all most fish only live 3 to five years.
  • Benjamin Lovewell: Excellent web page, it’s very informative and useful.
  • Diana: Hi I have a dwarf gourami and 2 rommy nose tetras in a 60 lt tank what fish can I add safely to my tank ..thanks
  • Kohl: Can ghost shrimps and guppies and platies and swordtails and neon tetras go together
  • Jack Chessher: Kohl- they should go together just fine, but remember to have the Livebearers (guppies, platies and swordtails) in the correct ratios of 1 male to 3 females. Just be careful though as neon tetras may get a bit nippy towards the guppies and swordtails with their long fins.
  • Kohl: Could gold fish go with them
  • Jack Chessher: No, goldfish are cold water fish, whereas the other fish and invert you’ve stated are tropical fish, and mixing the two together could lead to one not being 100% healthy.
  • Kohl: My 30 gallon tank is cloudy and I rinsed out the filter really well and it starting to clear but what should I do I set up the tank 3 weeks ago and I have 6 male guppies and 6 platies and 1 ghost shrimp and I’m going to get neon tetras and swordtails and more ghost shrimp today
  • laraine hewitt: kohl:
    hi I would leave till it clears or but some aqua safe in the water to clear it.

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