Not to worry, these are the pet variety. My son wanted a per of his own and somehow ended up with two hermit crabs, names Lightning and Flash.
Unfortunately, on day two, Flash burrowed into the sand of the "crabitat" and has rarely been seen since in three weeks. Lightnigh on the other hand, can often be found climbing the plastic vines we provided.
The third photo shows a "naked" one running around, but we don't know who it was, as the other was dug in, and can only tell them apart by shell colour!
A while back a co-worker sent around a photo of a helicopter that showed the oddest "bent rotor" effect. Our general agreement is that is was due to the relatively slow scan rate of a cell phone camera, and the high speed rotor.
"Did you see the pole I just hit?"
Impressed by this, I snapped a photo of a Dash-8 turboprop with my cell-phone camera and obtained this lovely result:
"Aarrgh! the propeller is tearing itself apart!"
Yes, I turned on my cell phone in mid flight to take this (my bad). BTW, the prop tips are yellow. That bottom phantom blade looks like it is tearing off. And there are only four blades on a Dash-8 turboprop...