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Cnidaria - Wikipedia, the free encyclopedia


Cnidaria is a phylum containing over 10,000 species of animals found exclusively in aquatic ... Several free-swimming species of Cubozoa and Scyphozoa possess ... a middle layer of jelly-like materi...

Jellyfish and Comb Jellies | Smithsonian Ocean Portal


Chrysaora melanaster, one of the largest jellyfish commonly found in the Arctic, ... Between these layers is a gelatinous material called mesoglea, which makes up most ... Many microscopic organisms, such as bacteria, also use cilia to swim— but .... are genetically identical because they all come from a single fertilized egg.

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 ...

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


A conspicuous feature of cnidarian jellies is the bell, also known as the ... Covered by a very thin epidermal tissue, the rest is made up of a gelatinous material called the .... with a sessile (attached) asexual polyp phase and a free- swimming sexual ... The fertilized eggs develop into tiny ciliated larvae known as planulae that ...


spo.nmfs.noaa.gov/Fishery Leaflets/leaflet535.pdf

Jellyfishes or, as they are often called,. "sea nettles" .... species of medusae also have been found in fresh or very ... to any free- swimming jellyfish type of ... The fertilized egg undergoes gradual development into a ciliated larva. The larva ...

Fj Cnidarian life cycles have two stages - Plasma Membrane


Apr 23, 2016 ... When an egg is fertilized, it develops into a free-swimming, ciliated larva called ... Many species can also reproduce asexually by budding or fission. ... is thick and firm, giving rise to their common names, jellyfish or sea jellies. ... sexual reproductive stage, producing eggs and sperm in organs called gonads.

jellyfish care manual - Association of Zoos & Aquariums


Jan 28, 2003 ... Sommer at Monterey Bay Aquarium found this species also had a scyphistoma .... pelagic (medusa) stage by another asexual process called strobilation. ... species the fertilized egg eventually gives rise to a new sessile polyp. .... Ephyra: Small, first stage, free-swimming jelly destined to grow up to mature ...

Transcriptome profiling of the dynamic life cycle of the scypohozoan ...


Free-swimming planulae were found highly enriched for functions related to cilia and ... The CL390-like gene, suggested to act as a strobilation hormone, was also highly ... Aurelia aurita Jellyfish Scyphozoa Transcriptomics Life-cycle stages ..... The motile planula which emerges from the fertilized egg on completion of ...

Free swimming larval stage or ephyra of common jellyfish - ARKive


Tiny hair-like structures called 'cilia' on the body of the jellyfish produce currents ... The fertilised eggs undergo development in pockets in the arms that ... Typically found close to the coast, the common jellyfish can also be found in estuaries.

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Hydroids and Jellyfish - Academics


Hydroids can consist of solitary organisms but are more commonly found as colonies ... These oral arms contain stinging cells called cnidocysts (MASLA). ... 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.

Cnidarians and Ctenophores


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 suitable ...

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


Mar 8, 2016 ... tion, most eggs developed to an encapsulated planula stage and then ... reproduction via lateral budding producing ciliated swimming ... drive not only the seasonal timing of medusa but also their .... Egg Fertilization and Development ... Carukia barnesi free swimming planula larvae were first observed six ...