A hugely popular and very adaptable species, the convict is one of the most ubiquitous fish in the hobby. It is often referred to by synonyms such as Cryptoheros nigrofasciatus and Cichlasoma nigrofasciatus. It's difficult to know how much to recommend it to the beginner, as despite its hardiness and ease of breeding, it's not really a community fish. However, if you want to breed a species and witness some amazing parental behaviour, it's an unreserved recommendation. It now exis…