Since adding the black ghost knife fish to the crew I have noticed strange sounds coming from her tank. It only happens at night and it's difficult to describe... somewhere between a click and a gulp? It's fairly infrequent and isn't terribly loud but it is audible from about 15 feet away.
Not sure what the purpose is. Perhaps it's like singing is for birds, to mark territory or attract a mate.
Anyone else observed their knives vocalizing? Any idea what it means?
Not sure what the purpose is. Perhaps it's like singing is for birds, to mark territory or attract a mate.
Anyone else observed their knives vocalizing? Any idea what it means?