|Thatched acorn barnacle. In life, the cirri are black.|
It swayed in the current for a few minutes, then the rest of the body bubbled out.
|The long, thick appendage is the barnacle's penis. When the barnacle is searching for a mate, it extends to 8 times the body length. An obvious solution to the problem of being glued in place.|
Soon, the entire body floated free. Before a hermit or crab caught it, I fished it out and photographed it on a wet black background.
|The long cirri (feathery tentacles) are the legs the barnacle fishes with. I'm not sure of the function of those shorter feathers. Near the base of the penis, the ridging is visible. Muscle tissue, maybe?|
|Another view, showing the entire body. The head end is on the left; in life, it stays cemented to the floor of the barnacle casing.|