Portuguese man-of-war

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Portuguese man-of-war:

see jellyfishjellyfish,
common name for the free-swimming stage (see polyp and medusa), of certain invertebrate animals of the phylum Cnidaria (the coelenterates). The body of a jellyfish is shaped like a bell or umbrella, with a clear, jellylike material filling most of the space between
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; polyp and medusapolyp and medusa,
names for the two body forms, one nonmotile and one typically free swimming, found in the aquatic invertebrate phylum Cnidaria (the coelenterates). Some animals of this group are always polyps, some are always medusae, and some exhibit both a polyp and a medusa
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Portuguese man-of-war

[‚pȯr·chə′gēz ¦man əv ′wȯr]
(invertebrate zoology)
Any of several brilliantly colored tropical siphonophores in the genus Physalia which possess a large float and extremely long tentacles.

Portuguese man-of-war

a long tentacled jellyfish whose sting can be deadly. [Zoology: NCE, 1408]

Portuguese man-of-war

any of several large complex colonial hydrozoans of the genus Physalia, esp P. physalis, having an aerial float and long stinging tentacles: order Siphonophora
References in periodicals archive ?
Curiously, a circular pad at the base of the cyst of the large cnidocyte of Physalia was described in a scanning electron microscopy study (see fig.
v][beta] punctate labeling was also observed in the distal region of the foot of isolated cnidocytes of Physalia (result not shown).
Given that Physalia is also a member of the class Hydrozoa and that its cnidocytes seem capable of integrating sensory information from multiple sources (Purcell and Anderson, 1995), there is no reason to assume that cnidocytes in Physalia do not function as pre-synaptic elements.
The cnidocytes present in the cnidosac of the feeding tentacles of Physalia are penetrant.
v][beta] is present in the Physalia cnidocyte and constitutes part of the [Ca.
In conclusion, this work suggests that the Physalia [PpCa.
Taxonomic redescription of the Portuguese man-of-war, Physalia physalis (Cnidaria, Hydrozoa, Siphonophorae, Cystonectae) from Brazil.
Intracellular recordings from cnidocytes in the tentacles of Physalia (Purcell and Anderson, 1995) during applications of aqueous extracts of fish mucus are characterized by bursts of small depolarizing potentials.
Irrespective of the organization of the cnidocytes, be they in small planar clumps (Chrysaora), broad circumtentacular bands (Chiropsalmus), single capitate bulbs (Cladonema), or the linear arrangement of nearly cnidosacs found in Physalia and Porpita, a dense plexus of FMRFamide IR neurons is present around the base of the cnidocytes.
As noted earlier, application of an extract of fish mucus to Physalia tentacles triggers bursts of electrical activity that can be recorded as synaptic events in single cnidocytes (Purcell and Anderson, 1995).
The control and discharge of nematocysts especially in Metridium and Physalia.