That is a male Gold Sererum. I have one in my 55 gallon, which is just about 8 feet to my left as I type this. Sid, named after the sloth in Ice Age, is nearly 9 inches long and gets along very well with the smaller fish in the tank (Bolivian Ram, Keyhole Cichlid, 4 Giant Danios, 2 Banjo Catfish, a Pictus Catfish and a Cory Catfish). Gold Severums, on average, hit 6 to 7 inches in length and can live upwards of 15 years in a well maintained and properly sized and stocked tank. We have had Sid since SHE was the size of a quarter, a little over 2 years. When fish are small, especially cichlids, telling male from female can be next to impossible...so we just name them what ever we want...though some find it odd to name a fish. As Sid matured, it became clear that we have a female....she does not have the red streaks or the red eyes that are hallmarks of male Severums.
Gold Severums are smaller than the Green Severum, which can hit 12 inches.
Yeah, I'm a fish guy. I have a 55 gallon in the living room with two Common Goldfish and a 38 here in the office with a female Convict Cichlid and a male Convict Cichlid/Texas Cichlid cross...he is named Mr. Mean for a reason, just as the female Convict is names Mrs. Mean....meanest dang fish I have ever seen. I used to be very very active on Oscarfish.com, and am a member of the advice team on that site. My activity level on that forum declined greatly after getting CFS2 and finding this site.....planes being a bigger passion than fish. A few years ago, my wife and I had ten aquariums up and running...now we are at three..and my weekly workload of tank maintenance is much more manageable.
OBIO