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class in phylum Echinodermata which includes sea stars characterized by carnivorous diet, regenerative abilities |
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class of phylum Echinodermata which includes brittle stars characterized by a combination of fragility and strong regenerative abilities, so that they will readily lose arms to predators, can be carnivores, planktivores or herbivores |
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class of Echinodermata which includes sea cucumbers, characterized by very reduced endoskeleton, bilateral symmetry (as well as cross-sectional pentaradial symmetry), toxins in the skin, detritivorous diet, evisceration as a defense mechanism |
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the act of forcefully expelling internal organs in order to startle/distract/entangle predators |
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some sea stars have the ability to pull out part of their stomachs, attached only by ligaments attached to ossicles in their arms, digest their prey externally, and reswallow it - this is esp. useful for bivalve prey, so that the two shells only need to be separated enough to allow the sea star's stomach entrance |
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class of Echinodermata containing sea urchins and sand dollars characterized by their mouth structure with five teeth called Aristotle's lantern, tubular feet and hard exoskeletons |
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class of Echinodermata containing feather stars and sea lilies, characterized by long jointed arms covered in pinnules, cilia and tubular feet (often more than five arms) benthic although some groups become swimmers as adults |
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Definition
class of Echinodermata containing feather stars and sea lilies, characterized by long jointed arms covered in pinnules, cilia and tubular feet (often more than five arms) benthic although some groups become swimmers as adults |
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Definition
hydraulic system employing porous layer on top of base of animal called madreporite, ring canal around the base of the animal, radial canals in ea of five arms and staggered lateral canals across the arms ending in ampulla, small sacs attached to podia, muscular appendages that along with the ampulla make up the tubular feet |
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