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Ctenophora - Wikipedia


Ctenophora (/tᵻˈnɒfərə/; singular ctenophore, /ˈtɛnəfɔːr/ or /ˈtiːnəfɔːr/; from the Greek κτείς kt...

Jellyfish and Comb Jellies | Smithsonian Ocean Portal


Jellyfish and comb jellies are gelatinous animals that drift through the ... Many microscopic organisms, such as bacteria, also use cilia to swim—but comb .... are genetically identical because they all come from a single fertilized egg. ... discovered a new species, which was named Tamoya ohboya in a public naming contest.

Ctenophores - some notes from an expert - University of Washington


Nov 8, 2010 ... Ctenophores are characterized by eight rows of cilia, which are used for locomotion. The cilia in each row are arranged to form a stack of combs, also called ... and most swim by synchronous beating of the eight rows of comb plates. .... a larval stage that hatches out of the free-floating fertilized egg and ...

Jellyfish and Other Cnidarians - mesosyn.com


Cnidaria is a phylum containing over 10,000 species of animals found exclusively in aquatic ... Several free-swimming species of Cubozoa and Scyphozoa possess .... The fertilized egg produces a planular larva which, in most species, quickly .... Aurelia aurita (also called the moon jelly, moon jellyfish, common jellyfish, ...

Moon Jelly - Aurelia aurita - Details - Encyclopedia of Life


Tiny hair-like structures called 'cilia' on the body of the jellyfish produce ... The fertilised eggs undergo development in pockets in the arms that surround the mouth. The free-swimming larvae (known as 'planulae' larvae) are released during ..... Typically found close to the coast, this jellyfish can also be found in ...

Hydroids and Jellyfish - Academics

academics.smcvt.edu/dfacey/AquaticBiology/Coastal Pages/Jellyfish.html

The organisms commonly known as jellyfish belong to the class Scyphozoa, ... oral arms in comparison to the usual four arms, and they also lack tentacles. ... Larger jellyfish may be predators of fish or free-swimming invertebrates ... The sperm reaches the eggs located inside the female medusa and fertilization takes place.

Early Life History of the 'Irukandji' Jellyfish Carukia barnesi - NCBI


Mar 8, 2016 ... Post fertilization, most eggs developed to an encapsulated planula stage ... budding producing ciliated swimming polyps, which in turn settled and .... Carukia barnesi free swimming planula larvae were first observed six ..... also very similar to the monodisc strobilation recently discovered in M. virulenta [15].

cnidarian | invertebrate | Britannica.com


Apr 6, 2015 ... Cnidarian, also called coelenterate, any member of the phylum ... hydras, jellyfish , Portuguese men-of-war, sea anemones, sea pens, sea whips, and sea fans. ... Most medusae are slow-swimming, planktonic animals. .... In some species of hydroids that lack a free medusa stage, eggs are fertilized and the ...



Scyphomedusae are the "jellyfish" with which most people are familiar. The scyphozoan life cycle ... Fertilized eggs may be brooded for a time or may develop directly into a free-swimming, ciliated planula larva. A larva ... The strobila may look like a stack of saucers, the saucers being the immature medusae called ephyrae.

The Oceans Their Physics, Chemistry, and General Biology


Such areas may be called areas of reproduction, or nursery areas. .... is associated with eggs of considerable yolk content, such as are found in the ... Benthic animals of Arctic and Antarctic regions also commonly possess no ... The union of germ cells results in a free-swimming, ciliated, planula larva about 1 mm long (fig.

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sponges & cnidarian notes b1 - Biology Junction


Found in the kingdom Animalia & subkingdom Parazoa ... Flagellated cells called choanocytes or collar cells line their internal body cavity ... Amebocytes also transport carbon dioxide & wastes away from sponge cells ... eggs during sexual reproduction; Planula is the flagellated, free-swimming ... JELLYFISH LIFE CYCLE.

Jellies FAQs – Featuring Jellyfish & Other Gelatinous Zooplankton


The primary nematocyst action is located on the long, thin tentacles found on most ... A conspicuous feature of cnidarian jellies is the bell, also known as the umbrella. .... with a sessile (attached) asexual polyp phase and a free-swimming sexual ... The fertilized eggs develop into tiny ciliated larvae known as planulae that .....

Jellyfish - The soft sting - Guido Picchetti


Jellyfish are coelenterates, species that also include the flowerlike sea ... are rows and rows of barbed, poisoned hypodermic syringes called nematocysts. ... Among Scyphozoa jellyfish, the sex organs are found only in the free-swimming ... Fertilized eggs then grow into ciliated larvae that settle on the sea bed or rocks.