Is the body the size of a toonie or does that include the span of the arms as well? If it includes the span of the arms, then that's about it. They may get a little bigger, but not much. Of the ones that I have, the body can get to about just a wee bit beyond 0.25". Like about half the size of a dime maybe. Maybe if you stretched out two arms end-to-end on one of those guys you'd get something like 2", 2.5". Which seems to me, is somewhat large for those guys. I don't know if they tend to get predated upon by tankmates or what, because I don't too often see any that are that big.
OTOH, if the BODY is the size of a toonie, and the arms are beyond that measurement, then those are a different kind of brittlestar and then I have no idea how big they could get.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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