Dictionary > Siphonophore

Siphonophore

Definition
noun, plural: siphonophores
Any of the various marine invertebrate of the order Siphonohorae of the class Hydrozoa that usually float or swim in delicate colonies
Supplement
Siphonophores are aquatic animals of the order Siphonophorae. They belong to the class Hydrozoa, which is comprised of marine mammals of the phylum Cnidaria. These animals are seen as colonies rather than solitary. They are transparent and float or swim as a colony. A single specimen is actually a colony comprised of polyps or zooids with specialized function. Each zooid in a colony is a single organism; however, it is interdependent to the other zooids comprising the colony and it would not be able to survive independently. Siphonores are therefore multiorganisms recognized as a colony. In a colony, there are three groups: (1) cystonects (i.e. colony comprised of pneumatophore and siphosome), (2) physonects (i.e. colony with pneumatophore, siphosome, and nectosome), and (3) calycophorans (i.e. colony with nectosome and siphosome).1 An example of a siphonophore is the Portuguese man’o war (Physalia physalis), which is a colony of polyps (or zooids) that looks like a jellyfish. Another is Praya dubia, which is regarded as the giant siphonophore for being one of the longest animals at 40 to 50 m in body length. Some species are capable of bioluminescence. For instance, Erenna species emit red light. It is considered as the first marine invertebrate known to produce red light and the first non-visual predator that uses a luminescent lure for its prey (i.e. fish). Most of the siphonores capture by casting a wide net of tentacles with stinging capsules called nematocyst.1
Word origin: Greek siph┼Źn (“tube”) + pherein (“to bear”)
Scientific classification:

  • Kingdom: Animalia
  • Phylum: Cnidaria
  • Class: Hydrozoa
  • Subclass: Leptolinae
  • Order: Siphonophorae Eschscholtz, 1829

Other name(s):

  • Siphonophora Eschscholtz, 1829
  • See also:

    Reference(s):

    1 Siphonophores. Siphonophores.org. Retrieved from ://www.siphonophores.org.


    You will also like...

    Electromagnetic spectrum of a brain
    Sleep and Dreams – Neurology

    While learning and intelligence are associated with the functions of a conscious mind, sleep and dreams are activities o..

    A sperm cell fertilizing an ovum
    Human Reproduction and Fertilization

    For human species to obviate extinction, reproductive mature adults should be producing viable offspring in order to con..

    squirrel
    Animal Water Regulation

    Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..

    Plant Auxins
    Plant Auxins – Phototropism & Geotropism

    Plants produce hormones to regulate their growth. Auxins, for instance, influence plant growth. Know the role of auxin i..

    Psychiatry and mental disorders
    Psychiatry & Mental Disorders

    Different mental disorders are described here. Read this tutorial to get an overview of schizophrenia, affective mood di..

    Schematic diagram of bacterial lactose operon
    Gene Action – Operon Hypothesis

    Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..

    ..

    Related Articles...

    No related articles found

    See all Related Topics