The angelfish cannot keep all the dither fish out of their territory, so the hope is that they will give up trying to defend their boundaries. ... Many livebearers have a carefree, easygoing temperament that can help semi-aggressive species like angelfish chill out.

What is the purpose of a dither fish?

The term dither fish refers to an arbitrary group of aquarium fish, commonly used by aquarists, to help reduce innate timidity and aggression as well as to promote normal social behaviour in the other fish housed within the same aquarium.

Can Platies live with angelfish?

Platies are one of the best beginner fish out there. They are hardy, friendly, and extremely colorful. ... Platies don't require a large aquarium, so any Angelfish tank should be more than sufficient.