I had a female one years ago- had no idea what she was for the longest time- I nicknamed her 'big fat pig fish', 'cause that's what she was! She grew from a one incher to a seven incher in about a year, lived in my tanks with my oscars and severums, and seemed to eat anything, including a doofus roommate's bubble gum- ( I wanted to kill him for that)
the females are big lipped, and plain brown all over, and the males are black with red fins, which is partly why I had such a hard time finding out what she was- all the pics were of males