Royal Pleco (Panaque nigrolineatus)
…Also known as the Royal Panque, the royal pleco is a species of armored catfish (Loricariidae) that occurs in Brazil, Colombia, and Venezuela where it occurs in the Orinoco and Amazon river basins. Like other “plecos” Panaque nigrolineatus is a benthic feeder and feeds mainly on algae and detritus. P. nigrolineatus is widely known as one of the few fish that is capable of digesting wood, as (like termites) it has symbiotic bacteria in its gut, which are capable of breaking down the wood.
Images: Lcamtuf and Neale Monks