UNIT 7. INVERTEBRATES PART 2. ARTHROPODS. ARTHROPOD CHARACTERISTICS. Largest phylum of animals Most marine arthropods are crustaceans Body is segmented, bilaterally symmetrical Jointed appendages Exoskeleton made of chitin Molt (shed exoskeleton) small. CRUSTACEANS.
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BRYOZOANS, PHORONOIDS, LAMP SHELLS
Sunflower Sea Star
Brittle star (Ophiocoma imbricatus)
Purple Sea Urchin with spines
Banded Sea urchin
Orange sea cucumber
Acorn worm feces
Chordata- lack the backbone
Larva and adult