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Sea Angel

An overview of how the body systems of the yeti crab work.
by

Erin Brady

on 3 December 2014

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Transcript of Sea Angel

Sea Angels Reproduction Conclusion The sea angel is a simultaneous hermaphrodite. It fertilizes inside the body and releases a gelatinous egg. The eggs float in the water until hatching. The embryonic shell is lost withing the first few days after hatching. Digestion The sea angel moves through the water by flapping its "wings." What we call wings are actually its front feet, evolved to being a water creature. It is in the phylum mollusca, which is varied. However, a great deal of the phylum mollusca have been shown to have grown from land molluscs to aquatic animals. The sea angel has done this. Skeletal While the sea angel is beautiful and small, it is also very cannibalistic. It eats sea butterflies, which are in the same phylum. There wasn't much information on sea angels, so I used some sources that told me the basic things about how the systems worked, then I researched them more on my own. These lovely creatures are quite new to aquatic animals, being discovered only within the last ten years. Thank you for listening to my presentation. Human Vs. Sea Angel Sea Angel
Hermaphrodite
self- fertilizes
eggs in open sea
Human
two sexes
must fertilize the woman
connected to mother
born without calcium shell Skylar, C. (2007, 12 20). Sea angel; invertebrate; polar ocean . Retrieved from http://animania-daily.livejournal.com/6093.html Sea angels eat sea butterflies, which are mollusks. Sea angels are also mollusks, which means they eat their relatives... in a sense. The food travels through a very unique digestive tract in that it doubles back on itself. This means that the mouth and anus are at the same end, and the digestive tract "doubles back." The tract itself is just one long tube the continues throughout the body then ends close to where it began. Oceanside Meadows Inn. (unknown). Mollusks. Retrieved from http://www.oceaninn.com/the-nature-preserve/mollusks/ Ramel, G. (Unknown). The phylum mollusca. Retrieved from http://www.earthlife.net/inverts/mollusca.html Circulatory It has a heart and aorta, but is an open circulatory system. The blood is pumped to cavities that surround the organs, and the blood then diffuses where it is needed through the thin membranes of the sea angel. Nervous System Has a circum-oesophageal ring, ganglia, and paired nerve chords. The ring is simply a bundle of nerve tissue surrounding the esophagus. The ganglia is a mass of nerve cells, and the chords are what helps create the sense organs. Basic Information The sea angel is an aquatic animal that lives in the polar waters. Its diet consists of zooplankton and sea butterflies, which are actually related to the sea angel. They use their winglike tentacles to grab prey and stuff it into the mouth, which also happens to be the anus. They are gelatinous, lacking a skeletal system. To protect themselves from predators, sea angels release the pteroenone molecule, which no sea creatures will eat. However, up to 300 animals have been recorded as living on and in the sea angel. Urinary System Sea angels do have a urinary system, but not much of one. They only have kidneys to filter the urine, and they also filter the blood. After the urine is filtered for nutrients, it is put back in with the rest of the waste.
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