"Oskars"! Which aquarist doesn't know them, the giants of the genus Astronotus, who have managed to secure a firm place in aquariums thanks to their bulging eyes and despite their size of 30-40 cm, and have even been given a nickname. Only a few fish have received this honor, and the related genera Chaetobranchus and Chaetobranchopis are likely far from it. This may be because the genus Astronotus is relatively easy to care for.