@Chlidonias The name the zoo gives is "Bubble-nest Building Catfish", the name I used is what I put it in as in my fish lifelist back in 2016 when I first saw this animal. Why I used that name I don't know, but I would have taken it from somewhere. I know ztl refers to these as "Armoured catfish".
This species does build a bubble-nest, under a water lily leaf or something similar (fishkeepers may float a piece of polystyrene tile in the tank). The name 'Hoplo' comes from the old generic name of Hoplosternum, 'black marble' is new to me. It is an armoured catfish because of the bony plates along the body, which are a characteristic of the family including the favourite Corydoras catfishes.
