1.is used refer to any member of a large family of catfish
native to Central and South America
that posess sucker shaped mouths that are often introduced to aquariums to eat algae.
2. used to refer to a very low, scummy individual, a "bottom feeder
1.I had a pleco in my 10G tank, but he outgrew it.
2. that guy
is a total pleco, he asked my married
sister to do it with him.