polyp
One of two types of body form occurring in coelenterates, comprising a hollow cylindrical body with a ring of tentacles around the mouth.
Results for “polyp”
Ichthyological terms, not general ones.
polyphyletic
Relating to or characterised by descent from more than one ancestral form. A polyphyletic taxon is therefore one whose members' last common ancestor is not a member of the taxon.
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polyphagous
Feeding on numerous food types; having a generalistic diet.
breeding line
A group of identical, pure-breeding diploid or polyploid organisms, distinguished from others of the same species by a unique phenotype and genotype. Important in production of line breeding ornamental fish strains.
Hydra
Genus of freshwater cnidarian existing only in sessile, solitary polyp form attached to the substrate at one end and with a mouth surrounded by up to 12 tentacles at the other. Members are predatory, feeding mostly on small invertebrates, and regarded as pests in aquaria due to their appearance as whitish spots on submerged surfaces and tendency to prey on fish fry.
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