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Sponges (Porifera) Sponges, or Porifera, are simple invertebrates and filter feeders, meaning they collect small particles of food that are floating in the water. What is most interesting about sponges is their level of organization. Sponges are the only multicellular animals that are organized at the cellular level. This means that they function without forming discreet tissues and organs. Instead, the whole mass of the sponge is penetrated by innumerable tubes and chambers, (the aquiferous system). Water flows through this system as a result of the actions of specialized cells, called choanocytes. One of the biggest advantages of this system is that any cell can quickly specialize to do any function. This allows the sponge to have great powers of regeneration. Return to Previous Page

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Find out more about the true nature of this adult Polychaete on the last page!BRISTLE WORMS and their larva by Wim van Egmond Bristle worms, or Polychaeta, (= many bristles) are marine organisms related to the common earthworm. They have segmented bodies and very distinct bristles that are implanted in each segment. Many people will not be aware of their importance because they are almost exclusively marine creatures. They are extremely abundant. Mud dwelling forms are the main food of man ...

CLAUDIA E. MILLS Independent research scientist Friday Harbor Laboratories and Department of Biology University of Washington email: cemills"at"u.washington.edu I am a scientist who works on the gelatinous zooplankton, especially jellyfishes and ctenophores. After a couple of decades of research and field experience, I am very concerned about changes in both the ocean and terrestrial ecosystems and what they portend for all of us. I have written on a variety of subjects here that are part ...

Living Corals Presented by Odyssey Expeditions More than fifty million years ago, way before the first pyramid or even a crude hut, corals began construction of the largest structures ever built. Time passed, and the Earth was changed. Fighting waves and winds, dodging glaciers rising and falling with the level of the seas moving across the face of the planet with the continents these organisms, half-plant and half animal, blind, unthinking, ...

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Careers Event Calendar Outreach Partners in Science Press Room Resources and Publications Florida Manatee Florida Panther Freshwater GIS and Mapping Habitat Red Tide Saltwater Wildlife Red Tide Current Status Statewide Information This summary report of current red tide conditions around Florida includes a map of sampling results and regional status reports. Reports are generally updated on Friday afternoon. Additional information, if avai ...

Home News Deals Hardware Games Guides Features Downloads & Video Media Products Forums Login Register June 10, 2006 Hello Guest, [Login] Not an FS member? Register Here, it's FREE! Random Gallery >> Half-Life 2: Episode One Review Screenshots [39] (0) Latest Articles > Choose Article ( • Editor's Choice ) =================== EVGA e-GeForce 78> Knights of Honor > Speed Reading: A > •Eternal Battle Da> Eternal Battle Da> 3D Perform ...

Oceanography Space Sciences Blow the Ballast! CyberMail Search/Site Map Teachers' Corner Habitats: Coral Reefs - Location/ Reef Life LOCATION Coral reefs flourish in shallow areas (less than 120ft, or 37m) in tropical latitudes, or where warm ocean currents flow into more temperate areas. In deeper waters, not enough light penetrates the depths, which means the reef's main food producers, algae and plankton, cannot photosynthesize. Large reef-buildin ...

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Poriferans are commonly referred to as sponges. An early branching event in the history of animals separated the sponges from other metazoans. As one would expect based on their phylogenetic position, fossil sponges are among the oldest known animal fossils, dating from the Late Precambrian. Since then, sponges have been conspicuous members of many fossil communities; the number of described fossil genera exceeds 900. The approximately 5,000 living sponge species are classified in the phylum P ...

Jellyfish Few marine creatures are as mysterious and intimidating as jellyfish. Though easily recognized, this animal is often misunderstood. Bathers and beachcombers react with fear upon encountering this invertebrate but, in fact, most jellyfish in South Carolina waters are harmless. Jellyfish are members of the phylum Cnidaria. Members of this structurally simple marine group possess one of two body forms. Sea anemones, sea whips, corals and hydroids are polyps growing attached to roc ...

Welcome to the Khoyatan Sponge Page Sponges of the northeast Pacific Calcarea | Hexactinellida | Demospongiae | References Khoyatan Marine Laboratory houses a moderately large collection of NE Pacific Sponges. This material has been worked on by Bill Austin and Bruce Ott. A list of 260 species from central California to southern Alaska is recorded by Austin (1985). Approximately 30 additional species have been recorded since that time. Austin and Ott included a key to 130 species known ...

Marine GeoscienceGéosciences marines The GSC Marine Geoscience information has been and relocated. The page you attempted to view no longer exists. L'information des géosciences marines de la CGC a été relocalisé. La page que vous tentez de visualiser n'existe plus. Marine geoscience: Home page Site map Géosciences marines : Page d'accueil Plan du site Please update your bookmarks and links. Veuillez, s.v.p., mettre vos signets et vos liens à jour.

MSN HomeMy MSNHotmailShoppingMoneyPeople & Chat Sign In Web Search: Encarta® > > Subscriber Sign In| Help Home | Encyclopedia | Dictionary | Thesaurus | World Atlas | Multimedia | Quizzes | Top-10 Lists | Education | Upgrade your Encarta Experience Search Encarta June 10 This Week: Summer Movie Season •What's my line? A movie quotes quiz •Film studies: The history of motion pictures •10 films that should have won the Oscar, but didn't D ...

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Hydrozoa, Scyphozoa, Anthozoa Corals, Jellies, Sea fans Corales, Medusas, Abanicos de Mar Phylum Cnidaria "stinging-cells" (jellyfish, anemones and corals) Class Hydrozoa: fire corals Class Scyphozoa: jellyfish Class Anthozoa: Sea anemones, soft corals, gorgonians (sea fans), and stony corals Description Most corals are colonies of many individual animals that share a common skeleton. Each individual is called a polyp. The body of the polyp occupies little cups or corallites attach ...

SEA LICE or Seabathers Eruption Adult Thimble Jellyfish (Linuche unqui culata) CLINICAL ARTICLES SEABATHER'S ERUPTION OR "SEA LICE": New findings and clinical implications Mary T. RusselI, RN, MSN, CCRN, CEN, and Robert S. Tomchik, MD, MPH, Boca Raton, Miami, and Fort Lauderdale, Florida. [ History | Treatment | Prevention | References ] History For the past 11 years, during the months of March through August, residents and tourists along 250 miles of Florida's southern Atlan ...

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An Introduction to Coral Reefs Click here to go directly to information about coral anatomy. Click here to go directly to information about types of coral reefs. Click here to go directly to information about zooxanthellae. Click here to go directly to information about coral feeding. Click here to go directly to information about coral reproduction. Click here to go directly to information about coral diseases. Click here to go directly to information about coral bleaching. Click ...

Abstract The marine sponges of British Columbia are presented. Their systematics and taxonomic history are also discussed. Introduction Sponges have been known for their commercial value since the time of Aristotle. During the many centuries since then little attention has been paid to them. Serious study of the group really began around 1862 by Bowerbank (1862) and Schmidt (1862). The relationships between sponges and the importance of characteristics for taxonomic work was not well underst ...

CHEATING DEATH: THE IMMORTAL LIFE CYCLE OF TURRITOPSIS While colonial animals can have their "immortality," solitary individuals are doomed to die. Hydrozoan cnidarians usually have a complex life cycle wherein a colonial stage is seen to lead up to the sexually mature solitary adult stage. Eggs and sperm from solitary sexual adult medusa (jellyfish) develop into an embryo and planula larva, and they then form the colonial polyp stage. Medusa are formed asexually from polyps. The medusa have ...

Field Guide PORIFERA Underwater Field Guide to Ross Island & McMurdo Sound, Antarctica PORIFERA sponges Click on each organism to view more information volcano sponge Anoxycalyx (Scolymastra) joubini sponge Asbestopluma aff. lycopodina fan sponge Calyx arcuarius spiky sponge Cinachyra antarctica orange dendritic sponge Clathria (Axosuberites) nidificata cactus sponge Dendrilla antarctica brain sponge Guitarra fimbriata finger or pipe sponge Haliclona d ...

< > News Release: Visit our ThinkQuest Jr. 2001 Website: Why are Hawaii's Wetlands Vanishing? In order to view our video clips you will need Quicktime 4.0 or better. Please be advised that unauthorized use of all photos at this site constitutes copyright infringement. Recipient of the ThinkQuest Jr. Platinum Award Featured in the Technology and Learning Magazine This website was created by the Keiki Korals of Enchanted Lake Elementary School, Kailua, Oahu, Hawaii, for ThinkQuest Jr. 2000

Extreme 2000 Expedition - University of Delaware - For more information, contact Tracey Bryant at (302) 831-8185, or tbryant@udel.edu Call for Betacam footage. Photo by Robert Cohen Craig Cary, an associate professor at the University of Delaware, serves as chief scientist on the Extreme 2000 expedition. During the deep-sea dive, Cary will place a first-ever telephone call from the seafloor to answer questions from middle- and high-school students. Graphic Courtesy of Craig ...