janitor fish

== English == === Etymology === From janitor +‎ fish, coined by the Filipino locals and as well as the aquarium fish enthusiasts for its ability to clean aquaria by eating algae and fish excrements. === Noun === janitor fish (plural janitor fish or janitor fishes) (Philippines) A pleco, pleco fish or plec: Any of several South and Central American fish, of the family Loricariidae.