Not Quite a Fish

NOT QUITE A FISH Alcasid, Aaron Clyde Publico, Angeo Miguel Torio, Denyse Arwen STEM 7 - SR. M. CONSUELO CHUIDIAN

ECHINOD Echinoderms? They are a phylum of marine invertebrates that includes sea lilies, sea urchins, and starfishes. They are the most diverse class of marine invertebrates, and play an important role within shore environment and the deep seas What makes them unique? They do not have eyes or a central nervous system, they instead, rely on receptors found on their arms Instead of swimming around to move, they use their tube feet which acts as a suction cup that they use to walk around the sea floor Echinoderms only has two sections of the body. The oral surface where their mouth and tube feet are, and the aboral surface where their wastes come out of. Echinoderms have no bones in their body, and instead have calcium carbonate endoskeletons There are no known echinoderm classes that live in freshwater.

ERMATA Thoughts about the Phylum? AC Echinodermata, for me, represents the seafloor’s natural beauty and plant-like organisms, and it is beneficial for marine life since it provides oxygen in deeper depths of the seafloor allowing more organisms to live there. Echinoderms are fascinating for me and seeing them wants me to study and discover more about the 5 percent of the earth’s ocean that was only been explored and charted. Angeo For me, echinoderms are distinct species although they share many traits and play a vital ecological function. In certain places, they are utilized as food and medicine, and they are a crucial element of the ocean food chain. However, with human activities causing catastrophe on the marine ecosystem, certain species' ecological responsibilities are no longer sufficient to maintain, and as a result, sea life continues to decline. If echinoderms didn't exist, the ocean's biodiversity would be significantly less interesting. Arwen For me, echinoderms feel magical. they're not the typical fishes that you always see swimming in the sea, they're more like plants that completes the sea. they don't swim as fast as other fishes, in fact, they're not fully categorized as a fish, rather a food for them. And seeing them makes me think that there really is more that we have to learn about our oceans.



CrinFeaotherisdtar ea Fact File Echinodermata krefinrnidoaCoommrnisnemtmoh\"ieedecaraeGinannrio'inesnigedgskc\"lfiilwoceyorno,mmtaridfneiscds 15 years Phylum Life span up to 20cm Length Diet tiny drifting organisms Location and particles Speed Western parts of pacific ocean and along the sides of the Atlantic 5cm per second Creature Features There are three main sections of a crinoid: the stem, the arms, and the calyx The different body parts of the crinoid often regenerate to maintain their inner layer of protection Crinoids are self sufficient, often decomposing and recuperating when needed Their arms and feet trap food using a sticky mucus Feather stars do not have a stomach, their foods cycle through their body They have three stages of life: larval stage, free swimming period, and pinnule stage They segregate themselves as male and female crinoids live in different habitats



Same same, but... different? Coming from the same phylum, these three classifications may be similar in some ways... but how do they differ?

Animals in the Phylum ECHINODERMATA Crinoidea Echinoidea Alike They are exclusive marine animals that has an open circulatory system, can regenerate, and can reproduce either sexually and asexually. Different Has a star-shaped body Has a spherical body Their tube feet has no Their tube feet has suckers suckers Their arms are divided They have no arms into two parts or bifuricated They have a compact skeleton and spines They are spineless

AENCimHaIlNsOinDtEhReMPhAyTluAm Asteroidea Crinoidea Alike They are exclusively marine animals that have a common body structure, consisting of star-shaped bodies and tube feet. They have both the ability to regenerate themselves. DIFFERENCES They have suckers on their Suckers are not present on tube feet. the tube feet. Its body is made up of There are no spines or moveable spines and pedicellariae. pedicellariae. Papulae are the organs that They lack on the respiratory system, allow them to breathe. thus they rely on their water- vascular system to breathe.

Animals in the phylum ECHINODERMATA Echinoidea Asteroidea ALIKE They are both \"spiny-skinned\" invertebrates that exclusively inhabit in marine habitat and feature tube feet containing suckers as well as moveable spines. They have a spherical They have a flat and body. star-shaped body. There are no arms on Their body is made up their body. of 5 up to 40 arms. Their respiration is Their respiration is facilitated by the tube feet. facilitated by the papulae.

References https://www.thoughtco.com/class-echinoidea-profile-2291839 https://a-z-animals.com/animals/sea-urchin/# http://jupiter.plymouth.edu/~lts/invertebrates/Primer/text/echinoid ea.html#:~:text=Echinoids%20have%20an%20egg%20shaped,they%2 0do%20not%20have%20arms. http://mmdskeletal.weebly.com/echinoidea-sea-urchine.html http://jupiter.plymouth.edu/~lts/invertebrates/Primer/text/asteroid ea.html https://www.wiki.ng/en/how-to/characteristics-of-class-asteroidea- 822102 https://animaldiversity.org/accounts/Asteroidea/ https://franswazz.tumblr.com/post/24504031014/jwstudio-red- feather-star-by-clownfish33 https://www.yumpu.com/en/document/view/11969035/jenis- crinoid-feather-stars http://www.wildsingapore.com/wildfacts/echinodermata/crinoidea /crinoidea.htm#:~:text=What%20do%20they%20eat%3F,parabola%2 0like%20a%20satellite%20dish. https://www.divephotoguide.com/user/keealf/gallery/kee- alfian/photo/9592/#viewImage https://www.encyclopedia.com/science/encyclopedias-almanacs- transcripts-and-maps/sea-lilies-and-feather-stars-crinoidea https://www.encyclopedia.com/science/encyclopedias-almanacs- transcripts-and-maps/sea-lilies-and-feather-stars-crinoidea https://www.leisurepro.com/blog/explore-the-blue/5-fun-facts- feather- stars/#:~:text=Feather%20stars%20are%20unstalked%20crinoids,first %20observer%20named%20them%20such. https://franswazz.tumblr.com/post/24504031014/jwstudio-red- feather-star-by-clownfish33 https://littlethings.com/pets/beautiful-deep-sea- creatures/2539866-11 www.australiangeographic.com.au%2Fblogs%2Fcreatura- blog%2F2017%2F08%2Ffeather-stars%2F&psig=AOvVaw369Y- 6y7D3w_mbIinoaU60&ust=1647044296280000&source=images&cd= vfe&ved=0CAwQjhxqFwoTCNDBx4LlvPYCFQAAAAAdAAAAABAV

References www.earth.com%2Fnews%2Fmicroplastic-pollution-causes- deformities-in-sea-urchins%2F&psig=AOvVaw108- OluH1cAB4tfu5aG_BR&ust=1647044892992000&source=images&cd= vfe&ved=0CAwQjhxqFwoTCICTj6DnvPYCFQAAAAAdAAAAABAD www.discoverwildlife.com%2Fanimal-facts%2Finsects- invertebrates%2Fdo-starfish-have-arms-or- legs%2F&psig=AOvVaw0_fJ9NQjYIQXx3v9ytJevj&ust=164704493256 7000&source=images&cd=vfe&ved=0CAwQjhxqFwoTCLik2LLnvPYC FQAAAAAdAAAAABAJ https://www.sciencedirect.com/topics/earth-and-planetary- sciences/echinoderm https://manoa.hawaii.edu/exploringourfluidearth/biological/inverte brates/phylum-echinodermata https://www.liveaquaria.com/article/187/?aid=187 https://byjus.com/biology/echinodermata/ https://animaldiversity.org/accounts/Echinoidea/ https://www.digitalatlasofancientlife.org/learn/echinodermata/echi noidea/ http://jupiter.plymouth.edu/~lts/invertebrates/Primer/text/echinoid ea.html#:~:text=Echinoidea%20is%20a%20class%20that,spines%20an d%20three%20jawed%20pedicellariae. https://www.thoughtco.com/class-echinoidea-profile-2291839 https://a-z-animals.com/animals/sea- urchin/#:~:text=They%20range%20in%20size%20from,they%20weigh %20about%20one%20pound.