Could Corydoras be killing other fish? One of readers asks us if this is why some of their Neons are going missing...
Searching for "predator"
Jeremy Gay advises a reader on feeding anglerfish.
Jeremy Gay offers his advice to a PFK reader who found his Boxing shrimp eating one of his blennies, and is worried his other fish might be at risk.
Pufferfish inflate to prevent predators eating them, but how do they do it and why don't their ribs break when they do so?