Field guide No. 162
Spool ferry
Leaves a trail home.
A wooden thread spool sails across an alpine lake as a ferry, unwinding a turquoise rope wake behind it.
Field noteAnything that floats can ferry. Wood floats; the spool merely kept its thread.
Also possible, also breaking category
Clamshell cornflakes at breakfastClams in milk instead of flakes: wrong breakfast, perfectly possible clams.
Shell accommodationHermit crabs moved into shells long before anyone with a staircase did. Scale is the only holdup.
Downhill unspoolingThread is white and laid in lanes; so are pistes. The groomers have merely taken the hint.
Saltwater etiquetteCrabs lift things all the time; waitering is the new part. Unusual career change, nothing more.