dactylozooid

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dac`tyl`o`zo´oid

    (dăk`tĭ`lô`zō´oid)
n.1.(Zool.) A kind of zooid of Siphonophora which has an elongated or even vermiform body, with one tentacle, but no mouth. See Siphonophora.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
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Around the gastrozooid there are polyps specialized in reproduction (gonozooids), and between them at the type of the umbel, are circles of polyps specialized in defense (dactylozooids), arm-ed with many cnidoblasts borne in small spheres that may completely cover the specimen.
2 Pelagic life
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