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Kane,
Sure - beach wrack is terrible, lots of garbage, but in some environments, the lack of empty gastropod shells means that some land hermits go "unprotected". Better that it found this bit of trash to carry around than to be eaten by a bird don't you think? I did a science fair experiment 40 years ago that offered fake shells to aquatic hermits. I was amazed at what they would "try on for size".
JHemdal
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