Conducting a trial on Wild Poinsettia (thanks to Slick for identification--see comment)http://home.att.net/~larvalbugrex/poinsettias.html says "Euphorbia dentata is called toothed spurge, wild poinsettia, and tooth-leaf poinsettia. It is not often included in wildflower books, but grows profusely in our yard."
This appears to be the kind growing in my yard that oozes a milky juice when picked which usually indicates the presence of natural latex.
Tank went directly over to the plant when it hit the sand and ate a bit of it. Trial will continue when my crabs finish a group molt that is occupying their attention.
