Why are Marine Invertebrates important to man and the sea?
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Marine invertebrates usually consist of the phylum porifera, cnideria, coelenterata, arthropoda and mollusca.\nInvertebrates like zooplankton are the major source of food for marine filter feeders like whales. Sponges are known for their beauty and some sponges are used as bath sponges.Jelly fish are useful scavengers.Arthropoda are widely used by humans as seafood -- namely crabs, prawns, lobsters etc. Mollusca are also used as seafood, and for the immensely profitable pearl industry.
88976
nvertebrates are an extraordinarily diverse group of animals that include over 30 phyla. Invertebrates do not have a backbone, nor a bony skeleton. This large group of animals includes sponges, cnidarians, flatworms, roundworms, segmented worms, mollusks, echinoderms, and arthropods.\nSubtopics\nArthropods (290) Flatworms (6) Cnidarians (6) Mollusks (9) Echinoderms (7) Segmented Worms (5)
526032
Algae are responsible for providing much of the oxigen in our atmosphere and water.  Protozoans and fungi are crucial in the breakdown of dead organic matter.  All 3 are important in the global food chain and ecosystems.
505010
most plants that require fertile soil and alot of water live in a delta. human like to live in delta because they can grow good crops. so other animals that feeds on the crops like the grasshoppers live on the delta. There is really no fish that live in a delta because it is where a river meets the ocean and neither salt water nor fresh water fish want to leave their habitat and go to the other side. (just think about the beach, you dont see any fish)
1131877
water vascular system helps the echinoderms in circulating the food & waste materials.....moreover it helps in their locomotion....
582108
Lots of them in aquaculture--Fish, shellfish, shrimp, sponges...\n\nOn land, you've got bees and silkworms, and aren't there some crocodile or alligator farms?
650434
All organisms have symbiotic relationships. \n\nIn the case of sea horses the most obvious example are the bacteria that live in the gut. Without them the fish becomes much so prone to infection thatit can not survive. And of course the bacteria find the food provided essential to their survival.
535375
i think animalia contains all animals - fish, reptiles, mammals, birds and amphibians. dolphins are obviously not bacteria, fungi, insects, etc. if you meant mammalia it is because dolphins -\nbreathe air with lungs, not gills\nbreastfeed their young that do not hatch from eggs\nhave four chambered hearts
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Dear Hydra is part of our ecosystem and It is food of alots of organism and feeds upon microorganisms.Thus it plays crucial role in balance of very small water bodies.\nWe all learn basic principles of development and physiology with Hydra a model.It is also a model for studing regeneration.Finally it make you curious enough and you asked this question.
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Fish and sea creatures have a swim bladder.  This is an organ that inflates/deflates to hold their pressure and keep them afloat.
465759
Why yes Pet, there are forams in the limestone blocks of the pyramids of Egypt!\n\nAs a matter of fact limestone holds many marine organisms, most are like that of forams, very tiny planktonic organisms; forams are about 1mm in length.
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wow...  it might be easier to list the animals that don't. When you add in fresh-water crustaceans, you get even more mamals and such. In fact, between zooplankton and shrimp alone, probably 90% of the aquatic population eat crustaceans, from simple hydra all the way up to baleen whales.
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oooo...both are fun subjects...\n\nthings that are required to be taken and will help for marine biology:\n\n1. oceanography science\n2. ecosysteminal biology \n3. earth science\n4. zoology\n5. botony (plant study)\n\nothers that may help: \n\n1. minor chemistry\n2. minor human biology\n\n\ninterior design things that will help: \n\n1. home decoration\n3. interior art\n\n\nothers:\n\n1. minor contemporary design.\n\n\nhope i helped and have fun!
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Probably many molluscs would make good environmental indicators (depending on what specific feature you are studying).  Most often I've heard of bivalves being used to indicate heavy metal pollution.  This is likely due to their method of feeding.  (Read more about Bivalves - http://en.wikipedia.org/wiki/Bivalve )\n\nHere is one example of how several molluscs were studied to see which was the best indicator of heavy metals:\n\n"The relationships between concentrations of the heavy metals Pb, Cd, Cu, Zn, Co, Ni, and Ag in nine bivalve molluscs (Arca ventricosa, Chama isotoma: Lithophaga teres. Pinctada margiritifera, Pycnodonte hyotis. Spondylus ducalis. Modiolus auriculatus, Trichomya hirsuta, Ustularca renuta) and their environment were studied."\n\nThere determinations were...\n\n"Accumulation of Pb and Cd by T. hirsuta was linear with time and increased in direct proportion to the external concentration of these metals. No loss of either metal was detected after 12 days in 'normal' seawater."\n\nFrom:  "Investigations of the potential of bivalve molluscs as indicators of heavy metal levels in tropical marine waters"  http://www.publish.csiro.au/nid/126/paper/MF9820285.htm\n\nFrom WikiPedia (in general):\n"Indicator species are unique environmental indicators as they offer a signal of the biological condition in a watershed or ecosystem, and are a warning system that pollution has entered the food web.\nThe term indicator species is a bit misleading, as indicators are often whole groups of flora/fauna types which can be used to assess environmental condition.  Most indicator species are fish, invertebrates, periphyton and macrophytes."\nhttp://en.wikipedia.org/wiki/Indicator_species\n\nCheers!
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Many species of organisms live in rivers.If there were no rivers in the world,these organisms that depend entirely on rivers would not exist.Rivers also provide us with fresh water, and food like fish.They also give us a mode of transport(by boats,canoes).Our ancient ancestors made their homes along rivers.Rivers support great diversities of life.Take seas for example,we can't really drink saltwater, and it would cost alot to purify it.Rivers are much more convenient.They are also a source of beauty.
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In sea algae are the primary producers in the marine Food Chain.To start an ecosystem or biome primary producers are main requirement.So,you are right!
110483
Very true. Mollusc anatomy and physiology could fill a book.  Anatomy of a snail? A squid? A chambered Nautilus? A seahare? They are all molluscs yet very widely in their anatomy and physiology.\n\nThe books the above poster referenced are excellent college level texts that cover most invertebrate life.  I would also suggest for a more simple approach the Marine Biology Coloring Book. It is not a kids book, but has some good diagrams on a variety of molluscs.\n\nThere are a number of websites that have valid information as well. If you edit your questions, I can post some links to specific species informative web sites.