Which phylum is exclusively marine and is named for having many spines and spikes?


Question: Which phylum is exclusively marine and is named for having many spines and spikes?

Certainly! The phylum that fits the description you provided is Echinodermata. Echinoderms are exclusively marine organisms, and their most prominent feature is their spiny skin. These fascinating creatures include sea stars (or starfish), sea cucumbers, sea urchins, sand dollars, and brittle stars . They exhibit pentaradial symmetry, meaning their bodies are organized around a central axis with five equal parts radiating outward. Additionally, echinoderms have an endoskeleton composed of calcareous ossicles.

Their specialized water-vascular system allows them to perform various functions, including locomotion, feeding, and gas exchange. Echinoderms play essential roles in marine ecosystems and contribute to the overall biodiversity of our oceans. Feel free to explore more about these remarkable marine creatures!  

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