echinoid in a sentence
a.
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Definition
Echinoid refers to a marine animal belonging to the class Echinoidea, characterized by a hard, spiny shell and typically found on the ocean floor, including sea urchins and sand dollars.
Sample Sentences
- The echinoid, with its distinctive spiny texture, is often found in shallow sea environments.
- Scientists study echinoids to understand their role in marine ecosystems and their evolutionary history.
- During the fossil record analysis, researchers discovered ancient echinoid species that date back millions of years.
- Echinoids, such as sea urchins, play a crucial role in grazing on algae and maintaining coral reef health.
- The vibrant colors and unique shapes of living echinoids make them a popular subject for marine biologists.