An experienced sailor's observations on ship behaviors and facial expressions.
Ships had pretty flexible backs which aided in communication. Nobody really knows what the funnel's purpose serves as they are just solid shaped growths coming from the backside. Some think they are visual displays as different species have different shaped funnels. (The species with this shaping are considered extinct)
The males typically have much grander funnels then females do so they probably make him appear larger then he really is.
The "bobbing" behavior is strictly male, females haven't been observed to do this. It is to show off the male's strength. Only the strongest males can bob.
When females are in season they slap their rudders in the water. The sound probably carries on for miles in the water as males soon come in to check it out.
Ships have flexible lips to communicate with as well. They help serve as the ship's "hands" as they have no forelimbs.
Anchors are also a visual display(in the males they can be enormous) dropped anchors can also signify sickness. Not only do they help keep ships from drifting off but can also be used as weapons..
Ships are typically solitary creatures who can be violent and curious if they meet up.