Barnacle’s Pop Heard at Tongue Point Sparks Call for Audio‑Video Confirmation

During a four‑day field trip to Washington’s Olympic Peninsula, a researcher heard a distinct pop and click from an acorn barnacle at low tide on Tongue Point. The sound, described as “clickety‑clack” followed by a pop, coincided with visible movement of the barnacle’s shell plates. The observation prompted a message to a retired marine invertebrate zoologist, who urged recording the event with synchronized video and audio to verify that the barnacle itself produced the sound. The incident illustrates how attentive listening to background noise can reveal overlooked animal behavior, a theme echoed in the article’s discussion of honeybees, hermit crabs, and orb‑weaver spiders. The next step is to capture the barnacle’s motion and sound in a controlled recording to determine whether barnacles emit audible signals during feeding or other activities.