I think you are correct Vieja Synspilum especially sense you said he turns pinkish. if thats what it is they get very beautiful and large they dont color up till they are about 6-8 inches then they get really colorful. If I remember correctly they are from central America. http://www.cichlid-forum.com/profiles/species.php?id=105lil_miss_dian said:i think he might be a Vieja synspilum