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Hydroids can be hard? like tiny tube worm bodies? Just curious..I'm still leaning to colonial hydroids, maybe someone else will chime in with their 0.02
Yeah some can. From wiki:Some species have the polyps budding directly off the stolon which roots the colony. The polyps are connected by epidermis which surrounds a gastrovascular cavity. The epidermis secretes a chitinous skeleton which supports the stem and in some hydroids, the skeleton extends into a cup shape surrounding the polyp.Hydroids can be hard? like tiny tube worm bodies? Just curious..

