Can oscar fish hear sounds, voices, and music? The answer is more nuanced than a simple yes or no — oscars detect sound differently from humans, using a combination of an inner ear and a lateral line system that picks…

Astronotus crassipinnis is the other oscar — the lesser-known second species in the genus that most fishkeepers have never heard of, let alone seen in person. While its famous sibling Astronotus ocellatus dominates pet stores worldwide, A. crassipinnis remains a…