Hermit Crab Changes Shell & Hermit in a Bottle
“After having looked for years, we finally saw a hermit crab in the act of switching shells. And, in the same month, also saw one walking around in a bottle!”
Find out lots of great pictures and videos by the divers at Blenny Watcher, an excellent dive and natural history blog! H/T to @echinoblog.
How about glass shells made especially for hermit crabs? http://www.glassshell.com
Or perhaps, plastic: http://www.makerbot.com/blog/tag/project-shellter/