Jeez, they all look awesome from pics I found on Google, but the Cichlasoma salvini, Amatitlania nigrofasia, Herichthys carpintis,and Herichthys labridens are the most eyecatching. Approximately how many fish would I be looking at if I wanted ones that I could watch grow yet keep all of them together for life in my 55 gallon (theoretically, barring death and aggression)?