Sh The plecostomus is popular among aquarium owners
for its ability to remove algae. It uses its strong jaw
muscles to suck food off rocks and other surfaces, like
the glass of a fish tank. The swim bladder allows the
plecostomus to stay easily wherever there is food,
often near the bottom of the tank. The plecostomus has
large scales and a hard skeleton.
To which group of fish does the plecostomus belong?