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Sea Creatures from the Deep By Pierce Greer and Abigail Edwards Pierce and I did a project in class where we made qualitative and quantitative observations about different sea creatures. Qualitative data is observations about the characteristic of an object. Quantitative data is data that includes measurements. When you use quantitative data, you use numbers. So, we decided to take this project one step further by actually researching these amazing sea creatures. The best thing about it is that we get extra credit in science! You should try it too, and your essays will be posted on Mrs. Thomas’s school website. Sea Creatures The Puffer fish Puffer fish, or blow fish, do not swim very well. A predator that is able to snag a puffer before it inflates won’t feel very lucky for long. Almost all puffer fish contain tetrodotoxin, a substance that makes them foul tasting and often lethal to fish. Starfish Star fish are also known as sea stars. They usually have 5 arms. Acanthaster planci, a species of star fish commonly known as the crown-of-thorns starfish, is a large sea star. They have a lot of arm. Starfish (or sea stars) usually hunt hard, or stony, coral polyps. The sharp spines covering nearly the entire upper surface of the crown-of-thorns are their defense against large predators. They also have chemical defenses. Sea Horse Seahorse is the name given to 54 species of marine fish in the genus Hippocampus. "Hippocampus" comes from the Ancient Greek “hippos” meaning "horse" and kampos meaning "sea monster.” Seahorses are mainly found in shallow tropical and average temperature waters throughout the world, and they prefer to live in areas such as sea grass beds, coral reefs, or mangroves. Sharks Sharks are a group of fish that have skeletons, made of cartilage, five to seven gill slits on the sides of the head. Sharks today are known to be related to sting rays. I hope you enjoyed this extra credit assignment. We worked really hard on this. We only researched a few of the sea creatures that Ms. Thomas provided for us. We just chose the ones we thought we really interesting. There were sponges, coral and a lot of cool stuff! Maybe you feel the urge to make your own extra credit assignment!