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Marine Science Final

Phylum Cnidaria Cnidocytes-stinging cells used for protection
Phylum Cnidaria Radial symmetry Mesoglea- separate 2 tissue layers Gastrovascular Cavity-space in middle of body for digestion and reproduction
Body Forms Phylum Cnidaria Polyp- attached with tentacles up (ex. Sea anenome) Medusa- free floating with tentacles down (jellyfish)
Phylum Arthropoda Krill, lobster, crab, shrimp
Phylum Arthropoda Jointed appendages Segmented bodies Chitin exoskeleton Bilateral symmetry Crayfish use chelipeds to grasp food
Phylum Arthropod Class Merostomata Horseshoe crabs
Phylum Cnidaria Corals, anenomes, sea fans, jellyfish
Phylum Arthropod Class Pycnogonida Sea spiders
Phylum Arthropoda Subphylum Crustacea Barnacles, krill, crab, shrimp, lobster
Phylum Echinodermata Sea urchin, sea cucumber, sand dollar, brittle stars, sea stars, crinoids
Phylum Echinodermata Characteristics Radial symmetry Spiny skin Water vascular system Tube feet - used for movement and digestion
Phylum Annelida Polychaete worms Nephridia- water regulating tubes Segmentation Among most common marine organisms Found living in ocean depths, floating free near surface, or burrowing in mud and sand of beach
Phylum Ctenophora Comb jellies Not a member of Cnidaria Rows of cilia No cnidocytes- can't sting
Phylum Mollusca Mantle- muscular bad that surrounds visceral mass and secretes calcium carbonate she'll Muscular foot- movement
Phylum Mollusca Radula- tongue-like structure with scraping teeth for feeding Trochophore larvae- free swimming , with several bands of cilia
Phylum Mollusca Shell- encloses, supports, and protects the soft part of animal Cephalization (cephalopods)- head-foot
Phylum Mollusca Class Gastropoda Sea hares, snails, conchs, whelks, nudibranches (sea slug)
Phylum Mollusfa Class Bivalvia Oysters, clams, mussels, scallops Filter feeders, adductors hold 2 shells together
Phylum Mollusca Class Cephalopoda Squid, octopus, cuttlefish, nautilus Developed brain Most intelligent is thought to be the octopus
Created by: moo_30