Today I'd like to introduce you to her much larger cousin, Mick Jaggerfish.
The tank in which Mick lives is 4 feet wide. So he is at least 15-18 inches long. (Compare his length with the tetras above him.)
He lives in a tank with more than a dozen tetras, about a dozen corydoras, and the crowning jewels - six angelfish. He doesn't bother anyone. Even though he is larger than anyone else, he is very peaceful and prefers to eat algae and vegetable-based fish food, though occasionally he will eat a shrimp pellet.
No one bothers him, either, even when the angels are breeding and become very territorial. He has an armor-plated skin that protects him from predators.
There can usually only be one grown pleco in a tank, however, because the males can be territorial with each other. A male and female get along fine (as you can imagine) and will sometimes lay eggs inside a tube or log.