<< One other, perhaps more parsimonious possibility is that the greenish
worms
in question aren't just your everyday garden variety Lumbricus. >>
I used to get worms that were either greenish or yellowish-colored where I
used to live at; I fed them to my fish with some apprehension and they liked
them just fine. I fed the fish these worms right along with regular eartworms
and red wrigglers; they ate them indiscriminately but preferred the smaller,
more tender red worms. As far as the greenish-yellow worms go I never had a
problem with them.
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