Phoronis
noun
Pho·ro·nis
fəˈrōnə̇s
: a genus of small marine tubicolous unsegmented wormlike animals that have the mouth, anal opening, and nephridial apertures at one end of the body close together and surrounded by a horseshoe-shaped lophophore bearing numerous tentacles, a closed system of blood vessels containing red blood, and free-swimming larvae which pass through a complex metamorphosis see actinotrocha, phoronidea
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Merriam-Webster unabridged
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