There’s a general ‘rule’ throughout the animal kingdom which, basically, says that the larger the appearance of an individual, the more intimidating it is towards rivals and predators. Witness, for example, how male fish of many species spread their fins when facing rivals in disputes over mates, or territory, or food, or when they, themselves, are faced with the prospect of becoming another animal’s next meal. So…what’s this got to do with the saurian that forms the subject of this article? Quite a lot, in fact.
The armoured catfish of the genera Corydoras, Scleromystax, Brochis and Aspidoras are often referred to in the aquaristic literature as “swarm fish”, combined with the recommendation to always maintain at least 4-6 specimens together. In the aquarium, however, armoured catfish swim in a swarm only once in a while, are they really schooling fish?