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View Diary: Marine Life Series: Hermit Crab Basics (47 comments)

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  •  wonder why (3+ / 0-)
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    pucklady, jlms qkw, bushondrugs

    the light, surface texture or chemistry, perhaps natural shells have enough permeability that the crab notices a difference.  I've seen them using manmade containers, but never in glass - not too surprising given the sort of glass junk they're likely to encounter.

    •  back legs (5+ / 0-)
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      pucklady, Fabian, jlms qkw, Fonsia, bushondrugs

      The last pairs of legs are tiny and used to hook deep inside the shell, but they need a rough surface to cling to. We couldn't get that with the glass.

      Hate to say it, but I would bet the one in that picture was jammed into the shell by hand just before the photo was shot. (That one's a tree crab, btw)

      •  OK - surface texture (1+ / 0-)
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        so a glass shell etched might do the trick?  Perhaps even first coated with say salt crystals in liquid wash, dissolve the salt out with water. etch deep to form small pockets, then remove the wax with solvent and etch again for an overall texture.

        Or pour coarse silicon carbide into it, seal the mouth, and tumble it.

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