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Echinoderms are marine animals, which means they reside in the ocean. Echinoderms are found from the intertidal zone to the abyssal zone.
Deep Zone
The Intertidal Zone, Coastal Zone, Open Ocean, Ocean Trench, Photic Zone, and Aphotic Zone. (i asked this question then found it in my textbook)
* Aphotic Zone
Plankton plants are found in twilight zone of the ocean
artic zone
Clown fish live on the continental shelf part of the ocean zone.
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Coastal Ocean
Sea sponges are a part of the marine biome. They are even found in the disphotic zone of the ocean, also known as the Twilight Zone.
They are found in the intertidal zone.
The benthic zone is a region at the lowest level of an ocean or lake. The intertidal zone is the shallowest part of the benthic zone.