Echinoderms
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Selena Starfish introduces herself as a member of the phylum Echinodermata. She lives in marine environments from shallow waters to ocean depths. As a carnivore, she feeds on small crustaceans using her tube feet and internal skeleton. She seeks a mate who shares her lifestyle in the ocean.
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Crustaceans are a diverse group of arthropods with over 40,000 species found in marine, freshwater, and terrestrial habitats. They exhibit bilateral symmetry, three germ layers, and a coelom. Crustaceans have a hard exoskeleton made of chitin and a calcified cuticle important for molting and growth. They have compound eyes and sensory antennae. Crustaceans display a variety of body plans and appendages and can regenerate lost appendages. They have open circulatory systems and various respiratory, excretory, and nervous systems depending on size. Reproduction involves internal fertilization and brooding of eggs in females.
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- 1. My name: Selena Starfish My phylum: Echinoderm My name is Selena Starfish. I am a member of the phylum Echinodermata. Echinoderm means “spiny skin” but don’t let the description fool you, we are a marvelous phylum consisting of two subdivisions. One containing Starfish, Sea Cucumbers, Sand dollars, Sea Urchins, and Brittle Stars, the other containing crinoids. Selena