Category Tank Mates

How Many Oscars Can You Keep Together? Figuring out how many Oscars in one tank you can safely keep is one of the most important decisions you will make as an Oscar owner. Get it right and you have an…

Semi-Aggressive Fish Compatibility Chart Semi-aggressive fish compatibility is one of the trickiest areas of freshwater fishkeeping to get right. Semi-aggressive fish fall into a gray zone — they are not peaceful enough for a standard community tank, but they are…

Yes — Oscar fish thrive alone and often prefer it. Here is why solo Oscars are happier, when pairing fails, and the exact tank size a single Oscar needs.

Oscar Fish Aggression: Are They Really Fighting? Oscar fish fighting is something every Oscar owner witnesses sooner or later, and it can be alarming the first time you see it. Your Oscars are locking jaws, chasing each other around the…

Can You Keep Angelfish With Oscars? Angelfish with Oscars is one of the most commonly searched fish combinations, and for good reason — both species are stunning South American cichlids that many aquarists want to keep in the same tank.…

Picking Oscar tank mates? Our compatibility matrix ranks 35 species — silver dollars, plecos, jack dempseys all tested. Plus 12 dangerous picks to avoid.