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Transcript of Class Holothuroidea
Branching Tentacles (8-30)
Size: .03m to 1m in length
Discharge Sticky Thread
Mutilate Their Bodies
Contract Their Muscles & Release Organs Through Anus Tentacles surround the mouth
Dioecious with a single gonad
Modified water vascular system Habitat/Ecosystem Sea cucumber live in sea floor habitats.
From warm tropical waters to cold deep sea trenches ecosystems.
Most abundant in coral reefs ecosystems
Can Breed Sexually Or Asexually
Sperm & Eggs Are Released Into The Water
Fertilization Occurs When Sperm And Egg Meets Respiration (Breathing) Sea cucumber get oxygen by pumping sea water in and out of an internal organ that is called a respiratory tree Locomotion They move using their tube feet which operate using a water vascular system.
In some, the feet are distributed out to the whole body.
For others they are concentrated on a “ventral” surface.
Some are restricted to rows along each radius.
Pain Killer For Arthritis
Kills Cancer Cells
Great For Wound Healing
Considered A Great Delicacy In Asia
More Than 1000 Living Species
Has No Brain Feeding/Diet They feed on decaying matter that floats in water or that's in sand.
Diet: Plankton & Detritus.
The tentacles that circle the food are covered in mucus which traps the food particles that are wiped off as the cucumber pulls the tentacles out of its mouth. Sea Stars
Holothuroidea Defense Mechanisms Reproduction Threats Benefits Interesting Facts Predators Bibliography a http://animals.howstuffworks.com/marine-life/sea-cucumber-info.htm