I first encountered hermit crabs many years ago on the muddy tidal flats around Darwin well before I began diving.
Since then I've learned they are everywhere and more than happy to take residence in someone else's abandoned home.
This Hermit Crab (
Paguristes frontalisi) at Port Noarlunga is both common and comical. This one's shell is fitting perfectly so not so many stumbles to laugh at but if you find a hermit crab that has taken up residence in some palatial new oversized shell it is hilarious watching the ensuing antics.
Photo: Robert Rath, 'Hermit Crab' 1/100 f/20 ISO320 100mm