I think there is a lot more communication going on in the non-human animal world than we realize.
Recent research shows the cuttlefish may communicate with "discolike arm gestures."
Scientists identified four arm wave signals cuttlefish use: “up,” “side,” “roll” and “crown”

Recent research shows the cuttlefish may communicate with "discolike arm gestures."
Scientists identified four arm wave signals cuttlefish use: “up,” “side,” “roll” and “crown”
