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It is not a dolphin because dolphins don't have gills. A dolphin is a mammal because it breaths air with lungs. The costume is a shark because it has gills (it is a fish)

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This is a shark because it gives birth to live young

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I do not think the contestant's costume was a dolphin.I do not think it is a dolphin because as you can see in the picture the shark has these gills near his eyes.

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I think it is a shark because sharks have gills and sharp teeth.Also it has a back fin.A dolphin has no gills and it's mouth is on the tip of it's beak looking nose.A shark has it's mouth on the bottom of it's head.Plus the dolphin has a blow hole.

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I think it is a shark because it has gills and a mammal has lungs but fish has gills. So it is in the fish group and also an shark.

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I think that is a shark because it has gills , and sharp teeth.

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I believe that the contestants costume was a shark.  I think its a shark because a shark is a fish and fish has gills. A dolphin is a mammal even though its lives in water

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I think the contestant's costume is a shark because a dolphin does not have gills.jose

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I think the contestant's costume is a shark because a dolphin does not have gills.jose

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No the costume is not a dolphin because a dolphin breath air and this costume has gills.

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I do not think the contestant's costume is a dolphin because dolphins do not have scales on there body and a dolphin is not a fish it is a mammal I think the contestant's costume is a shark.

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I do not think the contestant's costume is a dolphin because dolphins do not have scales on there body and a dolphin is not a fish it is a mammal I think the contestant's costume is a shark.

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the persons costume is not a dolphin because a dolphin does not have long sharp teeth and it is a mammal and a shark is a fish

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the persons costume is not a dolphin because a dolphin does not have long sharp teeth and it is a mammal and a shark is a fish

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i think that this is a shark because it has gills and dolphins don't have gills but a shark does also i think it is a shark because it has sharp teeth that is why i think it is a shark

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I think it is a mammal because it gives birth to live young and,mammals breathes air.

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I think that it is a shark because it has gills but a dolphin do not dolphin have a blowhole which allows them to breath air on the other hand sharks have gills that do not let them breath air which what makes them it fish.

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you are shark and a fish becaues you have gills and fish are coldblooded. And sharks have sharp teeth.And in the costume has sharp teeth and dolphins don't have sharp teeth.

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I think that the contestant's costume is a shark because it has fins and gills like a fish and not like a mammal.

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You could tell it is not a dolphin cause they do not have gills and dolphins are mammals have blow holes sharks have gills to breath in water .It could be a fish or a shark those are the two answers . Ruben

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no it is not a dolphin. I think it is a shark because it has gills and it has sharper teeth. most fish do not have sharpe teeth.and she hase no blo hole.For what i can see.                                                                        

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no it is not a dolphin. I think it is a shark because it has gills and it has sharper teeth. most fish do not have sharpe teeth.and she hase no blo hole.For what i can see.                                                                        

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jade

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No i do not think she is a dolphin. I think she is a shark/ fish. i know that because a fish has gills and this costume has gills. That is why i thin it is a fish.

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No i do not think she is a dolphin. I think she is a shark/ fish. i know that because a fish has gills and this costume has gills. That is why i thin it is a fish.

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Codi

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I think the girl is dressed up as a shark because on the costume there are gills and in the mouth there is also very sharp teeth just like a  shark. A shark is a type of fish and I know this because they breath with gills. And her costume has gills.But dolphins don't breath with gills they breath with lungs. That is why they have a blow hole. But sharks do not. Those are the reasons why I think she is dressed like a shark.

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its a shark because this fish has gills dolphins dont

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i think that she is a shark because a dolphin does not have gills and dolphins are mammel. 

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i think that she is a shark because a dolphin does not have gills and dolphins are mammel. 

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Mario.

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I think she is a shark because a dolphin is not a fish because it has a hole where it can breath air but fish can't breath air because it has no hole,and that's why she is a shark.

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I think that she is a shark. I know that she is a type of fish. I don't think she is a dolphin because dolphins don't have gills. Dolphins are mammals. They have blowholes.

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I think it is not a dolphin because it has gills and dolphins don't have gills .Do you know what dose have gills... A shark. So i think that costume she has on is a shark costume .

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I think that she is a fish which fish do i think she is. She is a shark you can tell by the gills on the side that she is a shark if she was a dolphin she would not have gills she would have a blow hole _ Kai

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I think that she is a fish which fish do i think she is. She is a shark you can tell by the gills on the side that she is a shark if she was a dolphin she would not have gills she would have a blow hole _ Kai

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I think that the girl is a shark. I think this because she has eyes on the side of her head and sharks have eyes on the side of their head. Also because she has the mark of the gills on the side, and dolphins don't have gills.She is dressed as a fish, but a dolphin is a mammal. Thats how I know she's a shark.