They get aggressive when they feel others are invading their space. This happens a lot with cichlids, like African cichlids, ...

Jewel cichlids are equally as aggressive and territorial as Oscars, and they prefer to prey on smaller fish that they can fit into their mouths. The blue acara is a type of freshwater cichlid with ...

Researchers realized they’d discovered a new species: Telmatochromis salzburgeri, or Salzburg’s cichlid. Salzburg’s cichlids can reach about 2 inches long in the wild but “tend to grow muc ...