Obelia is a genus in the class Hydrozoa, which consists of mainly marine and
some freshwater ... The medusae reproduce sexually, releasing sperm and eggs
that fertilize to form ... The planulae live...
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
Jellyfish are cnidarians, a group of animals that also includes corals, hydras, and
sea anemones. ... Several free-swimming species of Cubozoa and Scyphozoa
possess ... Stinging cells called nematocyst found in cnidocyte cells. .... The
fertilized egg produces a planular larva which, in most species, quickly attaches
itself to ...
The primary nematocyst action is located on the long, thin tentacles found on ... 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
medusae phase. ... Eggs are fertilized externally and develop into ciliated larvae.
Found in the kingdom Animalia & subkingdom Parazoa ... cross-fertilize eggs
during sexual reproduction; Planula is the flagellated, free-swimming larva that ...
Mar 8, 2016 ... tion, most eggs developed to an encapsulated planula stage and ... reproduction
via lateral budding producing ciliated swimming ... drive not only the seasonal
timing of medusa but also their .... Egg Fertilization and Development .... through
to detachment of the free swimming secondary polyp (Fig 3IV).
Hydrozoa are a class of jellyfish in the Phylum Cnidaria. ... includes a benthic
stalked (polyp) form, and free-swimming jellyfish (medusa) form. The polyps may
be found attached to docks or floats, while the medusae live in the plankton. ...
The fertilized egg develops as a planktonic planula larva, until it settles on a
Cnidarians, including the jellyfish and hydras, lie at the base of the ... Whether
these ganglia in the head can actually be called the 'brain' is ... They have also
been implicated in the control of tasks that require visual ..... egg into a
microscopic blastula and then into a free-swimming, ciliated, solid mouthless
www.nicholls.edu/biol-ds/Biol156/Lectures/Animal Diversity 1-2.pdf
Amoebocytes - found in Mesohyl - intermediate gelatinous layer. May possess
minute, needles called ... Exist as free-swimming planktonic form for a short time
... Phylum Cnidaria – jellyfish, hydras, anemonaes, corals ... Sexual reproduction
produces fertilized eggs. Develops into a free swimming, ciliated planula larva ...
Such areas may be called areas of reproduction, or nursery areas. ... care or
other protection accorded the eggs and larvae following fertilization. .... The union
of germ cells results in a free-swimming, ciliated, planula larva about ... Vaughan
(1919) found the pelagic period of corals to be from one day to two or three