Aristotle noted, too, that a river catfish which he called the glanis cares for its young, as the female leaves after giving birth; the male guards the eggs for forty or fifty days, chasing off small fish which threaten the eggs, and making a murmuring noise.
Aristóteles notou tamén que macho do siluro de río Silurus aristotelis, que el chamou o glanis coidaba das súas crías cando a femia as abandonaba despois de parilas; o macho garda os ovos durante 40 ou 50 días, espantando os pequenos peixes que ameazan os ovos, e facendo un ruído como un murmurio.