What Is The Main Differences Between A Common Plec And Gibbiceps?

[Spishkey]

i always thought they were the same until today i find i am wrong

what is the differences please?

 

[helterskelter]

Commons grow 18-22" and are brown and dark brown/black and the dorsal fin is usualy as high (or slightly higher) as the fish is deep.

Gibby's grow larger (22-26") and are more orange with dark brown/black spots. The dorsal fin is much taller twice as high as the body is deep.